Characterization of Tube Repair Weld Made of X20CrMoV121 (12Cr) Martensite Ferritic Steel

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Chapter in book “Fracture at all Scale” (2017):

 

Gordana M. Bakic, Milos B. Djukic, Bratislav Rajicic, Vera Sijacki Zeravcic, Aleksandar Maslarevic, Miladin Radovic, Vesna Maksimovic, Nenad Milosevic, Characterization of Tube Repair Weld in Thermal Power Plant Made of a 12%Cr Tempered Martensite Ferritic Steel, In book: Fracture at all Scales, Edition: Lecture Notes in Mechanical Engineering (LNME), Editors: Guy Pluvinage, Ljubica Milovic, Springer International Publishing (2017), pp. 151-169, DOI: 10.1007/978-3-319-32634-4_8

Book chapter – Link at Springer website (click on text)

Book chapter – Link (Free Download) at ResearchGate (click on text)

Abstract

The heat resistant tempered martensite ferritic steel X20CrMoV121 (DIN) has been extensively used within the last few decades as a material for boiler tubing systems and pipelines in thermal power plants (TPP). Long-term behavior of this steel is vastly researched and very well known, but main disadvantage is its poor weldability. In situ welding of martensitic steels is always challenging task and is usually quite difficult to implement properly in a short time, during forced outages of TPP. In this paper, characterization and mechanical properties of undermatch welded joint made during partial replacement of boiler outlet superheater (SH) in TPP by austenitic filler material, after 10 years of service are presented. Due to “cold” technique of welding, which does not required post weld heat treatment, this procedure were regular and widely used repair welding technique in two TPP (620 MW) units. In the purpose of comparison, two other type of matching welding joints of the same SH were also characterized: shop welded joint made by electrical resistance flash butt welding, as well as field welded joint made by gas tungsten arc welding during assembling of SH, which were both in service approximately 150,000 h.


cover

Fracture at all Scales

Editors: Pluvinage, Guy, Milovic, Ljubica (Eds.)

Book information

This book is a compilation of selected papers from the 2014 New Trends in Fatigue and Fracture (NT2F14) Conference, which was held in Belgrade, Serbia. This prestigious conference brought together delegates from around the globe to discuss how to characterize, predict and analyze the fatigue and fracture of engineering materials, components, and structures using theoretical, experimental, numerical and practical approaches.

It highlights some important new trends in fracture mechanics presented at the conference, such as:

•   two-parameter fracture mechanics, arising from the coupling of fracture toughness and stress constraints

•   high-performance steel for gas and oil transportation and production (pressure vessels and boilers)

•   safety and reliability of welded joints

This book includes 12 contributions from well-known international scientists and a special tribute dedicated to the scientific contributions of Stojan Sedmark, who passed away in 2014.

Copyright © 2017 Springer International Publishing Switzerland


This post is a part of:

The Network of Excellence (NoE) in Hydrogen Embrittlement

Image

The Network of Excellence (NoE) in Hydrogen Embrittlement aims to strengthen scientific and technological excellence by developing an integrated and interdisciplinary scientific approach, and also by addressing the fragmentation of European and Worldwide research in this area.

The Network of Excellence in Hydrogen Embrittlement is structured so that it consists of the following branches:

  1. Hydrogen Embrittlement Group on LinkedIn
  2. Hydrogen Embrittlement  – Understanding and research framework Project
    on ResearchGate
  3. Hydrogen Embrittlement Group on Mendeley
  4. Hydrogen Embrittlement and Materials Science Blog on WordPress
  5. Research Topic titled “Hydrogen Embrittlement Mechanisms” (closed now) in collaboration with Frontiers in Materials Journal within Corrosion Research section
  6. Damage and Fracture Mechanism Group on LinkedIn

The Network of Excellence (NoE) in Hydrogen Embrittlement logo, Copyrights by Milos Djukic all rights reserved © 2013, 2014

Hydrogen Embrittlement & Materials Science by Milos Djukic is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License.

What is Materials Science and Why Do I Like it?

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Post on DecentMatSci Blog.

DecentMatSci

According to the internet Materials Science is ‘the scientific study of the properties and applications of materials of construction or manufacture (as ceramics, metals, polymers, and composites)‘ I like to think of it as how something is made and what it does and why.

The reason I have applied to university for materials science is that its all around us and I think that advancements have been and will be crucial to humanities progress. A simple change of a certain molecular bond can entirely change how a material behaves and this is fascinating.

Why does elastic stretch? Why are diamonds hard? How do solar panels work? These questions and many, many more would go unanswered by many people but materials scientists know the answers.

There are many examples of why materials science is amazing, or atleast decent in a lot of cases. I want to share these here…

View original post 8 more words

Hydrogen embrittlement of INCOLOY aloy 945X (UNS N09945)

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Paper:

Demetriou V., Robson J.D., Preuss M., Morana R.: Effect of Hydrogen on the Mechanical Properties of Alloy 945X (UNS N09945) and Influence of Microstructural Features, Materials Science and Engineering: A, Vol. 684, 2017, pp. 423-434

Abstract

This study investigated the hydrogen embrittlement sensitivity of the precipitation hardened (PH) alloy 945X in three different metallurgical states. The three variants examined (obtained by different heat treatments) were the standard oil and gas industry condition, and two alternative microstructures with variations in fraction and morphology of γ′, γ″ and δ phases. For each metallurgical state, mechanical tests were carried out on both uncharged and hydrogen pre-charged specimens in order to evaluate the deleterious influence of hydrogen on mechanical properties. Material characterisation and post-test fractography was performed to understand the link between microstructural features, fracture behaviour, and susceptibility to hydrogen embrittlement. Fractographic analysis showed that, in the presence of hydrogen, intergranular fracture occurred for all the heat treatments, regardless the presence of δ-phase at grain boundaries. There was no simple correlation between the volume fraction of δ-phase and susceptibility to hydrogen assisted embrittlement. Rather, it was demonstrated that the morphology and distribution of δ-phase along grain boundaries plays a key role and the other precipitate phases also have an influence through their influence on the ease of strain localization.

Paper – Link at Elsevier, free to download for 6 weeks (click on text)

Copyright © 2017 Elsevier. All rights reserved.


This post is a part of:

The Network of Excellence (NoE) in Hydrogen Embrittlement

Image

The Network of Excellence (NoE) in Hydrogen Embrittlement aims to strengthen scientific and technological excellence by developing an integrated and interdisciplinary scientific approach, and also by addressing the fragmentation of European and Worldwide research in this area.

The Network of Excellence in Hydrogen Embrittlement is structured so that it consists of the following branches:

  1. Hydrogen Embrittlement Group on LinkedIn
  2. Hydrogen Embrittlement  – Understanding and research framework Project
    on ResearchGate
  3. Hydrogen Embrittlement Group on Mendeley
  4. Hydrogen Embrittlement and Materials Science Blog on WordPress
  5. Research Topic titled “Hydrogen Embrittlement Mechanisms” (closed now) in collaboration with Frontiers in Materials Journal within Corrosion Research section
  6. Damage and Fracture Mechanism Group on LinkedIn

The Network of Excellence (NoE) in Hydrogen Embrittlement logo, Copyrights by Milos Djukic all rights reserved © 2013, 2014

Hydrogen Embrittlement & Materials Science by Milos Djukic is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License.

Serbian NoE and Research Framework in Materials Characterization – Hydrogen Embrittlement

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I was invited by Prof. Branislav Todorovic, President of Organizing Committee to give a presentation at the 47th International Congress & Exhibition on Heating, Refrigeration and Air Conditioning, which was held in Belgrade, Serbia, 30 November – 2 December.

The title of the lecture was

“Serbian Network of Excellence and Research Framework in Materials Characterization”

This lecture was presented within special Forum titled: Towards 5 Continents Cooperation – Science, Research & Development, Standardization, Certification, Education Engineering & Manufacturing (KGH-SMEITS & ECS, UNEP, UNDP, IIR, ASHRAE-Danube, REHVA, IBPSA-Danube, ABOK, Chinese and Australian Engineers).

In this presentation we presented and discussed the capabilities of Serbian Network of Excellence (NoE) in materials characterization that aims to strengthen scientific and technological excellence by developing an integrated and interdisciplinary scientific understanding of materials characterization of engineering materials and their co-evolution with science, materials science, industry and society.

Proposed research framework in hydrogen embrittlement refers to the challenges and most obvious problems of how to link models, phenomenology and morphology of different materials failures of industrial components at different scales and how to successful translate the insights gained into outcomes of practical value to the engineering community.

Downloadable Presentation is available at:

a

Serbian Network of Excellence (NoE) in materials characterization

2

Serbian Network of Excellence (NoE) in Materials Characterization Team is composed of four renowned research-scientific institutions:

  1. University of Belgrade, Faculty of Mechanical Engineering, Department of Engineering Materials and Welding and Laboratory for Machine Elements and Systems Testing
  2. University of Belgrade, Vinca Institute of Nuclear Science, Materials Science Laboratory
  3. Military Technical Institute (MTI), Structural and technical materials laboratory
  4. University of Belgrade, Institute of Physics Belgrade

We are looking for partnerships in Research Project and formation of an excellent consortium consisting of complementary partners that will help us to retain our competitive edge in materials characterization and hydrogen embrittlement reasearch over the long term.

Serbian Network of Excellence (NoE) in Materials Characterization,

Coordinator and contact person: Milos Djukic,(mdjukic@mas.bg.ac.rs)

Assistant Professor, Ph.D., Mechanical Engineering, Materials Science, 

University of Belgrade, Faculty of Mechanical Engineering,

Department of Engineering Materials and Welding.


This post is a part of:

The Network of Excellence (NoE) in Hydrogen Embrittlement

https://milosdjukichydrogen.files.wordpress.com/2014/05/network21.jpg

The Network of Excellence (NoE) in Hydrogen Embrittlement aims to strengthen scientific and technological excellence by developing an integrated and interdisciplinary scientific understanding of hydrogen degradation of engineering materials and their co-evolution with science, materials science, industry and society, and also by addressing the fragmentation of European and Worldwide research in this area.

The Network of Excellence in Hydrogen Embrittlement is structured so that it consists of the following branches:

  1. Hydrogen Embrittlement Group on LinkedIn
  2. Hydrogen Embrittlement  – Understanding and research framework Project
    on ResearchGate
  3. Hydrogen Embrittlement Group on Mendeley
  4. Hydrogen Embrittlement and Materials Science Blog on WordPress
  5. Research Topic titled “Hydrogen Embrittlement Mechanisms” (closed now) in collaboration with Frontiers in Materials Journal within Corrosion Research section
  6. Damage and Fracture Mechanism Group on LinkedIn

The Network of Excellence (NoE) in Hydrogen Embrittlement logo, Copyrights by Milos Djukic all rights reserved © 2013, 2014

Hydrogen Embrittlement & Materials Science by Milos Djukic is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License.

 

Research Project HIPP on Hydrogen-induced degradation of steels – NTNU, Norway

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Hydrogen-induced degradation of offshore steels in ageing infrastructure – models for prevention and prediction (HIPP)


Project lead: Professor Zhiliang Zhang, Norwegian University of Science and Technology -NTNU, Department of Structural Engineering, Faculty of Engineering Science and Technology, NTNU Nanomechanical Lab, Norway

For more information about the project, see the project webpage

The primary objective of HIPP Project is to develop a model framework which describes and couples environment-assisted hydrogen degradation mechanisms at different length and time scales towards a predictive mechanism-based integrity assessment approach for oil and gas steel infrastructure.

Project Duration: 2014-2018, Funding: The Research Council of Norway, PETROMAKS2 Program

Structure of the HIPP project – from HIPP Project website (https://www.ntnu.edu/kt/research/hipp)

hipp-structure

This project attacks the challenge by linking modelling of fundamental mechanisms on different scales. On the basis of existing knowledge and expertise on atomistic simulations, embrittlement mechanisms and fracture mechanics assessment, this project will provide a scientific platform for an integrated model that can assess hydrogen induced failures in offshore steel structures.

The project team consists of three complementary groups (NTNU Nanomechanical Lab, SINTEF Materials and Nanotechnology, and University of Oslo), of skilled and experienced scientists that join their efforts in order to realize a mechanism-based integrity assessment approach.

Project partners

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SINTEF


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Project Members:

  1. Professor Zhiliang Zhang, NTNU, Project leader
  2. Professor Afrooz Barnoush, NTNU
  3. Dr. Vigdis Olden, SINTEF
  4. Dr. Antonio Alvaro, SINTEF
  5. Dr. Ingvild Julie Thue Jensen, SINTEF
  6. Prof. Ole Martin Løvvik, SINTEF
  7. Inga Gudem Ringdalen
    Research Scientist and PhD co-supervisor
  8. Dr. Annett Thøgersen, SINTEF
  9. Dr. Amin Shahrestani Azar, SINTEF
  10. Dr. Nousha Kheradmand, NTNU
  11. Tarlan Hajilou, NTNU
  12. Kai Zhao, NTNU
  13. Domas Birenis, UIO

HIPP Project publications:

  1. An invited presentation was given by HIPP scientist International Hydrogen Energy Development Forum 2015, Kyushu University, Japan, February 3-4: A. Alvaro, I. Thue Jensen, N. Kheradmand , A. Barnoush, O. M. Løvvik,  V. Olden, A multiscale approach to interface degradation by hydrogen
  2. PhD student Kai Zhao gave an oral presentation at the EUROMAT 2015 on Growth and Coalescence of Nanoided Iron.
  3. PhD student Domas Birenis gave a poster presentation on Atomic Level Study of Hydrogen-Induced Degradation on Offshore Steels at EUROMAT 2015.
  4. A. Alvaro, I. Thue Jensen, N. Kheradmand, O. M. Løvvik, V. Olden, Hydrogen Embrittlement in Nickel, Visited by First Principles Modeling, Cohesive Zone Simulation and Nanomechanical Testing, International Journal of Hydrogen Energy 40 (2015) 16892–1690
  5. Haiyang Yu, Jim Stian Olsen, Antonio Alvaro, Vigdis Olden, Jianying He, Zhiliang Zhang. A uniform hydrogen degradation law for high strength steels. Engineering Fracture Mechanics 157, (2016) 56–71

Photo – Structure of the HIPP project: NTNU – Norwegian University of Science and Technology all rights reserved © 2014

All pictures, text and logos in this post, Copyrights by NTNU – Norwegian University of Science and Technology, SINTEF amd University of Oslo all rights reserved © 2016


This post is a part of:

The Network of Excellence (NoE) in Hydrogen Embrittlement

https://milosdjukichydrogen.files.wordpress.com/2014/05/network21.jpg

The Network of Excellence (NoE) in Hydrogen Embrittlement aims to strengthen scientific and technological excellence by developing an integrated and interdisciplinary scientific understanding of hydrogen degradation of engineering materials and their co-evolution with science, materials science, industry and society, and also by addressing the fragmentation of European and Worldwide research in this area.

The Network of Excellence in Hydrogen Embrittlement is structured so that it consists of the following branches:

  1. Hydrogen Embrittlement Group on LinkedIn
  2. Hydrogen Embrittlement  – Understanding and research framework Project
    on ResearchGate
  3. Hydrogen Embrittlement Group on Mendeley
  4. Hydrogen Embrittlement and Materials Science Blog on WordPress
  5. Research Topic titled “Hydrogen Embrittlement Mechanisms” (closed now) in collaboration with Frontiers in Materials Journal within Corrosion Research section
  6. Damage and Fracture Mechanism Group on LinkedIn

The Network of Excellence (NoE) in Hydrogen Embrittlement logo, Copyrights by Milos Djukic all rights reserved © 2013, 2014

Hydrogen Embrittlement & Materials Science by Milos Djukic is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License.

What makes a materials scientist tickle?

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By Claudio Schoen, Associate Professor at the University of São Paulo about Non-linear thinking. Research area – Materials Science (general), Materials Mechanics and Computational Thermodynamics.

cgschoen

Back in year 1996 Walter Schütz, in his work “A history of fatigue” told the history on how Gassner in 1941, measuring the fatigue strength of high strength aluminum alloys of the series 7XXX (Al-Zn-Mg), and finding this was not much different from the lower strength, lower cost, alloys of series 2XXX (Al – Cu), warned that if they were used, for example, to build an airplane, this would lead to premature fatigue failures.

This argument is tricky and seems illogical. Aren’t the alloys of series 7XXX of higher strength compared to alloys 2XXX? And didn’t Gassner find out the fatigue strength was about the same? So why would the fatigue live be smaller if the 7XXX alloys were used?

The explanation for this apparent contradiction is simple. The only possible reason to use a higher strength alloy (especially when it is more expensive) in place of…

View original post 384 more words

Hydrogen Embrittlement of Industrial Components: Prediction, Prevention, and Models

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Paper:

Milos B. Djukic, Gordana M. Bakic, Vera Sijacki Zeravcic, Aleksandar Sedmak, and Bratislav Rajicic, Hydrogen Embrittlement of Industrial Components: Prediction, Prevention and Models. CORROSION. 2016; 72(7): 943-961., http://dx.doi.org/10.5006/1958

on

LES EXPERTS ANALYSE DEFAILLANCES

Blog

2016-07-05_17h26_56

12

LES EXPERTS ANALYSE DEFAILLANCES

2016-07-05_17h26_56

A paper find on ResearchGate and published in “Corrosion-Houston_Texas “- July 2016.

This paper gives an overview of the application of a model for structural integrity analysis of boiler tubes made of plain carbon steel exposed during operation to a local corrosion process and multiple hydrogen assisted degradation processes: hydrogen embrittlement and high-temperature hydrogen attack. The model is based on the correlation of mechanical properties to scanning electron microscopy fractography analysis of fracture surfaces in the presence of simultaneously active hydrogen embrittlement micro-mechanisms. The proposed model is practical for use as a predictive maintenance in power plants, as it is based on the use of standard macro-mechanical tests.

Read more

View original post

Hydrogen Embrittlement Topic – Special Symposium ICF14 Conference, Rhodes, Greece, June 18-23, 2017, “Fatigue and fracture in aggressive environments: mechanisms and risk assessment”

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Dear colleagues,

14th International Conference on Fracture (ICF14) will be held in the island of
Rhodes (Greece, June 18-23, 2017). For more information about ICF14
please, log on to the conference web page http://www.icf14.org

Prof. Emmanuel Gdoutos, Conference Chairman asked Prof. Robert Akid
(University of Manchester), Prof. Ihor Dmytrakh (Karpenko Physico-Mechanical Institute of National Academy of Sciences of Ukraine) and me (Ass. Prof. Milos Djukic, University of Belgrade, Faculty of Mechanical Engineering) as the members of the Scientific Advisory Board of ICF14 to organize the special symposium titled:

“Fatigue and fracture in aggressive environments: mechanisms and risk
assessment” (click on the link for Special Symposium Announcement)

within the frame of the Conference Special Symposia Programme.

Special Sumposium was also listed on ICF14 website  within Special Symposia/Sessions section (No. 1 on the list).

Please send by email your expression of interest with a tentative title of your presentation together with the name, affiliation and email address of the corresponding author and the names of co-authors before 1st October 2016 (QUOTING on the Subject line ICF14-MS) to:

mdjukic@mas.bg.ac.rs (Ass. Prof. Milos Djukic)

LOGO

We plan that this special symposium will cover the many important and actual
aspects of a general problem “Environmentally Assisted Fracture” including the following three main topic areas:
1. Stress Corrosion Cracking,
2. Corrosion Fatigue and
3. Hydrogen Embrittlement.

Our aim is to bring together top scientists and researchers in the field of  environmentally assisted fracture and hydrogen embrittlement in order to present the lastest achievements in fatigue, stress corrosion cracking and fracture in aggressive environments research and the current state of the art in understanding of hydrogen embrittlement phenomena.

We kindly invite you and your colleagues to participation in
this event. Please feel free to submit your Abstracts online before October 30, 2016.

We are looking forward to hearing from you and working closely with
you for the organization of a successful symposium.

Important Conference Dates:
– Second Announcement: December, 2015
– Submission of Abstracts: October 30, 2016
– Notification of Acceptance/Rejection: December, 2016
– Conference: June, 2017

For more information about 14th International
Conference on Fracture (ICF14) and the special symposium titled: “Fatigue and fracture in aggressive environments: mechanisms and risk
assessment”, which will be held in the island of
Rhodes (Greece, June 18-23, 2017) please, log on to the conference web page: http://www.icf14.org

Thanks in advance for your participation.
Sincerely,
Milos Djukic

Special Symposia, ICF14

ICF14 Scientific Program and Conference Tracks

ICF14 Scientific Committee

Tentative Program

Founded by Professor T. Yokobori in 1965, the International Congress on Fracture (ICF) is today the premier international body for promotion of worldwide cooperation among scientists and engineers concerned with the mechanics and mechanisms of fracture, fatigue and strength of solids. Over the years, ICF has made considerable progress in providing an international forum for highlighting individual and national accomplishments in the overall field of fracture. For more information about ICF please visit: http://www.icfweb.org/

Rodos


This post is a part of:

The Network of Excellence (NoE) in Hydrogen Embrittlement

NETWORK2

The Network of Excellence (NoE) in Hydrogen Embrittlement aims to strengthen scientific and technological excellence by developing an integrated and interdisciplinary scientific understanding of hydrogen degradation of engineering materials and their co-evolution with science, materials science, industry and society, and also by addressing the fragmentation of European and Worldwide research in this area.

The Network of Excellence in Hydrogen Embrittlement is structured so that it consists of the following branches:

  1. Hydrogen Embrittlement Group on LinkedIn
  2. Hydrogen Embrittlement  – Understanding and research framework Project
    on ResearchGate
  3. Hydrogen Embrittlement Group on Mendeley
  4. Hydrogen Embrittlement and Materials Science Blog on WordPress
  5. Research Topic titled “Hydrogen Embrittlement Mechanisms” (closed now) in collaboration with Frontiers in Materials Journal within Corrosion Research section
  6. Damage and Fracture Mechanism Group on LinkedIn

The Network of Excellence (NoE) in Hydrogen Embrittlement logo, Copyrights by Milos Djukic all rights reserved © 2013, 2014

Hydrogen Embrittlement & Materials Science by Milos Djukic is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License.

Hydrogen Embrittlement – Understanding and research framework, Online Project on ResearchGate

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ResearchGate 2016

Hydrogen Embrittlement – Understanding and research framework, Online Project on ResearchGate (click on text)

(90+ members, 250+ followers, 3700+ reads, 60+ updates, 450+ references) 

Dear colleagues and friends,
I started this online Project on ResearchGate (2016) as an extension of the former Hydrogen Embrittlement Mechanism Project on ResearchGate (2014) which was very successful and with an idea that the top experts in the field of hydrogen embrittlement and materials science come together and share valuable experiences about the current state of the art in hydrogen embrittlement.
ResearchGate 2014

Proposed research framework in hydrogen embrittlement refers to the challenges and most obvious problems of how to link models, phenomenology and morphology of hydrogen-related failures of industrial components at different scales and how to successful translate the insights gained into outcomes of practical value to the engineering community.


We are looking for partnerships and formation of an excellent consortium consisting of complementary partners that will help us to retain our competitive edge over the long term. Please check: Proposal of research framework in hydrogen embrittlement and materials characterization – Serbian team structure.        
                                                                                                                                                                              For more details please check our recent paper published in Corrosion journal

2

Numerous prestigious experts in the field of hydrogen embrittlement and materials science are the project participants (90+ members, 240+ followers). This Project is only accessible to the Project members, making them an ideal place for private and secure data sharing, real-time feedback and scientific collaboration.
I cordially invite all interested researchers, engineers and technicians in the field of materials science, materials characterization and hydrogen embrittlement to join and follow “Hydrogen Embrittlement – Understanding and research framework” Onlline Project on ResearchGate.

Thanks in advance for your participation.
Sincerely,
Milos Djukic

This post is a part of:

The Network of Excellence (NoE) in Hydrogen Embrittlement

NETWORK2

The Network of Excellence (NoE) in Hydrogen Embrittlement aims to strengthen scientific and technological excellence by developing an integrated and interdisciplinary scientific understanding of hydrogen degradation of engineering materials and their co-evolution with science, materials science, industry and society, and also by addressing the fragmentation of European and Worldwide research in this area.

The Network of Excellence in Hydrogen Embrittlement is structured so that it consists of the following branches:

  1. Hydrogen Embrittlement Group on LinkedIn
  2. Hydrogen Embrittlement  – Understanding and research framework Project
    on ResearchGate
  3. Hydrogen Embrittlement Group on Mendeley
  4. Hydrogen Embrittlement and Materials Science Blog on WordPress
  5. Research Topic titled “Hydrogen Embrittlement Mechanisms” (closed now) in collaboration with Frontiers in Materials Journal within Corrosion Research section
  6. Damage and Fracture Mechanism Group on LinkedIn

The Network of Excellence (NoE) in Hydrogen Embrittlement logo, Copyrights by Milos Djukic all rights reserved © 2013, 2014

Online Project logo, Copyrights by Milos Djukic all rights reserved © 2016

ResearchGate logo © 2008-2016 researchgate.net. All rights reserved

Hydrogen Embrittlement & Materials Science by Milos Djukic is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License.

A new article about hydrogen embrittlement in steels published in Corrosion journal

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A new article about hydrogen embrittlement published in Corrosion journal

Milos B. Djukic, Gordana M. Bakic, Vera Sijacki Zeravcic, Aleksandar Sedmak, and Bratislav Rajicic, Hydrogen Embrittlement of Industrial Components: Prediction, Prevention and Models. CORROSION. 2016; 72(7): 943-961., http://dx.doi.org/10.5006/1958

“Professor Milos Djukic, et al., presented a modeling approach that can be applied to industrial boiler tube systems, in a paper titled, “Hydrogen Embrittlement of Industrial Components: Prediction, Prevention, and Models.” This paper focuses on predictive models for the hydrogen embrittlement of plain carbon steels used in industrial boiler systems. Correlations between microstructure, fractographic observations, and macro-mechanical testing data are used to propose a model enabling enhanced predictive maintenance of industrial component systems. Crack formation and growth due to hydrogen embrittlement (HE) and high-temperature hydrogen attack (HTHA) are both addressed.“
– from EDITORIAL, CORROSION Journal, Vol. 72, Issue 7 (July 2016), 2015 Research Topical Symposium Proceedings – “Environmentally Assisted Cracking” by Christopher Taylor.

 

A background for the analysis of the viable hydrogen embrittlement mechanisms: hydrogen-enhanced localized plasticity (HELP) and hydrogen-enhanced decohesion (HEDE) in a ferritic-pearlitic carbon steel and development of a model for structural integrity analysis is a literature overview about the current state of the art in hydrogen embrittlement modeling and studies (140 References), presented in this paper.

Kudos Spotlights featured – Paper: “Hydrogen Embrittlement of Industrial Components: Prediction, Prevention and Models” published in CORROSION Journal

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We are proud that our recent paper: “Hydrogen Embrittlement of Industrial Components: Prediction, Prevention and Models” published in CORROSION Journal is featured in the latest edition of Kudos Spotlights #6

What is Kudos Spotlights?
Kudos aim is to highlight those researchers who are making great use of the Kudos toolkit to help their work stand out, and to provide inspiration to those seeking guidance.

 

Thanks Kudos – “Make sure your research gets read and applied.” Kudos is a free service that helps increase reach & impact of research; winner of 2015 ALPSP Award for Innovation in Publishing.

© 2016 Kudos Innovations Ltd. Kudos is registered in England – Registration No. 08642156.
Registered Office: 2A Ashurst Court, London Road, Wheatley, Oxfordshire, OX33 1ER, UK

Source: Kudos Spotlights #6

10.  Professor Milos Djukic

Paper:

Hydrogen Embrittlement of Industrial Components: Prediction, Prevention and Models

What’s it about?

A background for the analysis of the viable hydrogen embrittlement mechanisms: hydrogen-enhanced localized plasticity (HELP) and hydrogen-enhanced decohesion (HEDE) in a ferritic-pearlitic carbon steel and the development of a model for structural integrity analysis is a literature overview about the current state of the art in hydrogen embrittlement modeling and studies (141 References), presented in this paper.

Article Citation:
Milos B. Djukic, Gordana M. Bakic, Vera Sijacki Zeravcic, Aleksandar Sedmak, and Bratislav Rajicic, Hydrogen Embrittlement of Industrial Components: Prediction, Prevention and Models. CORROSION. 2016; 72(7): 943-961., http://dx.doi.org/10.5006/1958

Article – Link at NACE website (click on text)

Article – Link (Free Download) at ResearchGate (click on text)


CORROSION, the Journal of Science and Engineering is the premier research journal featuring peer-reviewed technical articles from the world’s top researchers and provides a permanent record of progress in the science and technology of corrosion prevention and control.

Copyright © 2016 NACE International. All rights reserved.

 SLIKA

A Structural Integrity Model for Hydrogen Embrittlement of Industrial Components (HELP + HEDE), Macro-Mechanical Response of Material.

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Our recent article in CORROSION Journal entitled:
Hydrogen Embrittlement of Industrial Components: Prediction, Prevention, and Models published in CORROSION journal (July 2016).

The proposed model for structural integrity analysis of industrial components is based on the correlation of mechanical properties to the fractography analysis of Charpy specimens in the presence of simultaneously active hydrogen embrittlement mechanisms: hydrogen-enhanced localized plasticity (HELP) and hydrogen-enhanced decohesion (HEDE) after reaching the critical hydrogen concentration.

A background for the analysis of the viable hydrogen embrittlement mechanisms in a ferritic-pearlitic carbon steel and development of a model for structural integrity analysis, presented in this paper, is a literature overview about the current state of the art in hydrogen embrittlement modeling and studies (140 References).

“Professor Milos Djukic, et al., presented a modeling approach that can be applied to industrial boiler tube systems, in a paper titled, “Hydrogen Embrittlement of Industrial Components: Prediction, Prevention, and Models.” This paper focuses on predictive models for the hydrogen embrittlement of plain carbon steels used in industrial boiler systems. Correlations between microstructure, fractographic observations, and macro-mechanical testing data are used to propose a model enabling enhanced predictive maintenance of industrial component systems. Crack formation and growth due to hydrogen embrittlement (HE) and high-temperature hydrogen attack (HTHA) are both addressed.“
– from EDITORIAL, CORROSION Journal, Vol. 72, Issue 7 (July 2016), 2015 Research Topical Symposium Proceedings – “Environmentally Assisted Cracking” by Christopher Taylor.

Article Citation:
Milos B. Djukic, Gordana M. Bakic, Vera Sijacki Zeravcic, Aleksandar Sedmak, and Bratislav Rajicic, Hydrogen Embrittlement of Industrial Components: Prediction, Prevention, and Models. CORROSION. 2016; 72(7): 943-961., http://dx.doi.org/10.5006/1958

Article – Link at NACE website (click on text)

Article – Link (Free Download) at ResearchGate (click on text)

This article is published in the July 2016 issue of CORROSION (special issue: 2015 Research Topical Symposia (RTS) – Environmentally Assisted Cracking).

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The RTS is the annual symposium organized by NACE research committee with a focus on topical issues of present scientific significance. The RTS was held at NACE International CORROSION 2015 Conference, Dallas, USA, March 15-19, 2015. The presentations at the RTS: Environmentally Assisted Cracking and articles in a future 2016 special issue of CORROSION were all invited contributions.

Abstract

Hydrogen embrittlement is a common, dangerous, and poorly understood cause of failure in many metal alloys. In practice, it is observed that different types of damage to industrial components have been tied to the presence and localization of hydrogen in metals. Many efforts have been made at understanding the effects of hydrogen on materials, resulting in an abundance of theoretical models and papers. However, a fully developed and practically-applicable predictive physical model still does not exist industrially for predicting and preventing hydrogen embrittlement. The connection of microstructure-based behaviors of materials and effects on the macroscopic measurable characteristics (stress levels, hardness, strength, and impact toughness) is of the utmost importance to achieve a unified model for hydrogen embrittlement. This paper gives an overview of the application of a model for structural integrity analysis of boiler tubes made of plain carbon steel exposed during operation to a local corrosion process and multiple hydrogen assisted degradation processes: hydrogen embrittlement and high-temperature hydrogen attack. The model is based on the correlation of mechanical properties to scanning electron microscopy fractography analysis of fracture surfaces in the presence of simultaneously active hydrogen embrittlement micro-mechanisms. The proposed model is practical for use as a predictive maintenance in power plants, as it is based on the use of standard macro-mechanical tests.

Copyright © 2016 NACE International. All rights reserved.

SLIKA


This article is among Top 20 (#14) most searched and viewed articles in CORROSION Journal (february 2017)

top20

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Altmetric Score – Who’s talking about your research?

Altmetric has tracked 4,932,132 research outputs across all sources so far.

Compared to these this article has done particularly well and is in the 98th percentile:

it’s in the top 5% of all research outputs ever tracked by Altmetric

86

Altmetric Score = 86

This post is a part of:

The Network of Excellence (NoE) in Hydrogen Embrittlement

Image

The Network of Excellence (NoE) in Hydrogen Embrittlement aims to strengthen scientific and technological excellence by developing an integrated and interdisciplinary scientific approach, and also by addressing the fragmentation of European and Worldwide research in this area.

The Network of Excellence in Hydrogen Embrittlement is structured so that it consists of the following branches:

  1. Hydrogen Embrittlement Group on LinkedIn
  2. Hydrogen Embrittlement  – Understanding and research framework Project
    on ResearchGate
  3. Hydrogen Embrittlement Group on Mendeley
  4. Hydrogen Embrittlement and Materials Science Blog on WordPress
  5. Research Topic titled “Hydrogen Embrittlement Mechanisms” (closed now) in collaboration with Frontiers in Materials Journal within Corrosion Research section
  6. Damage and Fracture Mechanism Group on LinkedIn

The Network of Excellence (NoE) in Hydrogen Embrittlement logo, Copyrights by Milos Djukic all rights reserved © 2013, 2014

Hydrogen Embrittlement & Materials Science by Milos Djukic is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License.

The IASCC in Steels and the example of How Materials Science can support the Nuclear Development

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I highly recommend to visit excellent blog cgschoen by Prof. Claudio Schoen from Escola Politecnica da Universidade de São Paulo, Brazil about science an technology, including scientific policy.

Milos Djukic

cgschoen

A nuclear reactor is a very harmful environment for materials: neutrons with no electric charge can penetrate into alloys and crystalline networks promoting displacements of its atoms from equilibrium positions. This mechanism is responsible to change material’s properties in which could result in a nuclear accident by failure of internal components. The task of choosing materials to operate and compose the structure of a nuclear reactor has paramount importance in nuclear activity, notwithstanding this is a major challenge.
Advanced Stainless Steels has been studied for nuclear reactors internal components because its good properties: relatively high strength, ductility, fracture and corrosion resistance. But in the middle of eighties, when IASCC (Irradiation-Assisted Stress Corrosion Cracking) was discovered and deeply studied, the steels were phased out in light water nuclear applications for safety reasons.
What is the IASCC? The scientific knowledge regarding Stress Corrosion Cracking (SCC) for materials operating in high- temperature and…

View original post 218 more words

Towards a Unified and Practical Industrial Model for Prediction of Hydrogen Embrittlement and Damage in Steels, ECF21, Paper

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This paper will be presented by Milos B. Djukic at the upcoming 21st European Conference on Fracture – ECF21, Catania, Italy, June 20-24, 2016.

Towards a Unified and Practical Industrial Model for Prediction of Hydrogen Embrittlement and Damage in Steels

By: Milos B. Djukic, Gordana M. Bakic, Vera Sijacki Zeravcic, Bratislav Rajicic, Aleksandar Sedmak, Radivoje Mitrovic and Zarko Miskovic

University of Belgrade, Faculty of Mechanical Engineering, Serbia

Abstract

Bearing in mind the multiple effects of hydrogen in steels, the specific mechanism of hydrogen embrittlement (HE) is active, depending on the experimental conditions and numerous factors which can be grouped as environmental, mechanical and material influences.

A large number of contemporary studies and models about hydrogen environment assisted cracking (HEAC) and HE in steels are presented in the form of critical review in this paper. This critical review represent the necessary background for the development of multiscale structural integrity model based on correlation between simultaneously active HE micro-mechanisms: the hydrogen-enhanced decohesion (HEDE) and the hydrogen-enhanced localized plasticity (HELP) and macro-mechanical response of material, unevenly enriched with hydrogen during service of boiler tubes in thermal fossil fuel power plants (TPP).

Several different experimental methods and techniques were used to determine the boiler tube failure mechanism and afterwards also the viable HE mechanisms in the investigated structural low carbon steel, grade 20 – St.20 (equivalent to AISI 1020). That represent a background for the development of multiscale structural integrity model based on the correlation of material macro-mechanical properties to SEM fractography analysis of fracture surfaces of Charpy specimens in the presence of simultaneously active HE micro-mechanisms in steel. The aim of this paper is to show how to implement what we have learned from theoretical HE models into the field to provide industry with valuable data and practical structural integrity model that will actually prevent HEAC and hydrogen damage of TPP components and also provide accurate predictions.

All text Copyright © 2016 by Milos Djukic – All Rights Reserved

Our recent article (2015):

Hydrogen Damage of Steels: A Case Study and Hydrogen Embrittlement Model

M.B. Djukic, V. Sijacki Zeravcic, G.M. Bakic, A. Sedmak, B. Rajicic, Hydrogen damage of steels: A case study and hydrogen embrittlement model, Engineering Failure Analysis, 2015, Volume 58, Part 2, pp. 485–498

About model of simultaneous action of hydrogen embrittlement mechanisms (HELP+HEDE) in steel and their effects on Mechanical Properties

Please check this post.

Paper – Link at Elsevier (click on text)

Paper – Link (free download ) at ResearchGate (click on text)

The most downloaded articles from Engineering Failure Analysis in the last 90 days.

Our recent article (2016):

Hydrogen Embrittlement of Industrial Components: Prediction, Prevention and Model

Milos B. Djukic, Gordana M. Bakic, Vera Sijacki Zeravcic, Aleksandar Sedmak, and Bratislav Rajicic, Hydrogen Embrittlement of Industrial Components: Prediction, Prevention, and Models. CORROSION. 2016; 72(7): 943-961., http://dx.doi.org/10.5006/1958

A background for the analysis of the viable hydrogen embrittlement mechanisms: hydrogen-enhanced localized plasticity (HELP) and hydrogen-enhanced decohesion (HEDE) in a ferritic-pearlitic carbon steel and development of a model for structural integrity analysis is a literature overview about the current state of the art in hydrogen embrittlement modeling and studies (140 References), presented in this paper.

Please check this post.

Article – Link at NACE website (click on text)

Article – Link (Free Download) at ResearchGate (click on text)

This post is a part of:

The Network of Excellence (NoE) in Hydrogen Embrittlement

Image

The Network of Excellence (NoE) in Hydrogen Embrittlement aims to strengthen scientific and technological excellence by developing an integrated and interdisciplinary scientific approach, and also by addressing the fragmentation of European and Worldwide research in this area.

The Network of Excellence in Hydrogen Embrittlement is structured so that it consists of the following branches:

  1. Hydrogen Embrittlement Group on LinkedIn
  2. Hydrogen Embrittlement  – Understanding and research framework Project
    on ResearchGate
  3. Hydrogen Embrittlement Group on Mendeley
  4. Hydrogen Embrittlement and Materials Science Blog on WordPress
  5. Research Topic titled “Hydrogen Embrittlement Mechanisms” (closed now) in collaboration with Frontiers in Materials Journal within Corrosion Research section
  6. Damage and Fracture Mechanism Group on LinkedIn

The Network of Excellence (NoE) in Hydrogen Embrittlement logo, Copyrights by Milos Djukic all rights reserved © 2013, 2014

Hydrogen Embrittlement & Materials Science by Milos Djukic is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License.

High strength low alloy steels and hydrogen – Presentation at About Corrosion blog by Mariano Iannuzzi

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A great presentation entitled:

High strength low alloy steels and hydrogen

by

Mariano Iannuzzi,

 

LINK

at  About Corrosion Blog: www.aboutcorrosion.com by Mariano Iannuzzi

The full presentation is embedded at About Corrosion Blog

Mariano

Unless stated otherwise, all charts, photos, and tables at About Corrosion Blog by Mariano Iannuzzi are published under the Creative Commons CC BY-NC-SA 3.0 license. They are free to use for non-commercial purposes. You can also modify the work as long as you share it under the same license.

This post is a part of:

The Network of Excellence (NoE) in Hydrogen Embrittlement

Image

The Network of Excellence (NoE) in Hydrogen Embrittlement aims to strengthen scientific and technological excellence by developing an integrated and interdisciplinary scientific approach, and also by addressing the fragmentation of European and Worldwide research in this area.

The Network of Excellence in Hydrogen Embrittlement is structured so that it consists of the following branches:

  1. Hydrogen Embrittlement Group on LinkedIn
  2. Hydrogen Embrittlement  – Understanding and research framework Project
    on ResearchGate
  3. Hydrogen Embrittlement Group on Mendeley
  4. Hydrogen Embrittlement and Materials Science Blog on WordPress
  5. Research Topic titled “Hydrogen Embrittlement Mechanisms” (closed now) in collaboration with Frontiers in Materials Journal within Corrosion Research section
  6. Damage and Fracture Mechanism Group on LinkedIn

The Network of Excellence (NoE) in Hydrogen Embrittlement logo, Copyrights by Milos Djukic all rights reserved © 2013, 2014

Hydrogen Embrittlement & Materials Science by Milos Djukic is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License.