An invited talk – paper titled:
HYDROGEN EMBRITTLEMENT IN LOW CARBON STEEL AND THE SYNERGISTIC INTERPLAY OF THE HELP AND HEDE MECHANISMS
– Prof. Milos B. Djukic, University of Belgrade, Faculty of Mechanical Enginnering, Serbia
will be presented in a Special Session on HYDROGEN-RELATED KINETICS IN MATERIALS (SS10), DSL-2017-Hydrogen Session -flayer free to download
13th International Conference on Diffusion in Solids and Liquids, DSL 2017
which will be held in VIENNA (Austria) from 26-30 June, 2017.
Abstract of invited talk:
The simultaneous activity and synergistic interplay of the hydrogen-enhanced decohesion (HEDE) and hydrogen-enhanced localized plasticity (HELP) mechanisms of hydrogen embrittlement (HELP+HEDE) was fully confirmed for the first time in low cartbon grade 20 – St.20 (or 20G, equivalent to AISI 1020) steel specimens in situ charged with hydrogen, and not only through simulation and modeling [1,2].
The activity of a particular hydrogen embrittlement (HE) mechanism depends on the local concentration of hydrogen in investigated steel. The HELP+HEDE model of HE in low carbon steels 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 effects and correlations between microstructure, fractographic observations, and macro-mechanical testing data (tensile testing, impact strength and hardness) are also considered.
This paper also gives an overview of the application of a model for structural integrity analysis of boiler tubes made of low carbon steel exposed during operation to a local corrosion process and multiple hydrogen assisted degradation processes: HE mechanisms (HELP+HEDE) and high-temperature hydrogen attack .
 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, 58 (2015), pp. 485-498, doi: 10.1016/j.engfailanal.2015.05.017
 M.B. Djukic, G.M. Bakic, V. Sijacki Zeravcic, A. Sedmak, B. Rajicic, Hydrogen embrittlement of industrial components: prediction, prevention, and models, Corrosion, 72 (2016), pp. 943–961, doi: 10.5006/1958
About Special Session 10
HYDROGEN-RELATED KINETICS IN MATERIALS (SS10)
Prof. Markus Wilde
Institute of Industrial Science,
The University of Tokyo
Continued annually since DSL-2010. This session discusses broad aspects of hydrogen (H)-related kinetics and H-induced phenomena in materials from a fundamental viewpoint. The aim is to obtain a deeper understanding of dynamical processes such as the atomic-level mechanisms of the reversible hydrogen transportation across the gas/solid interface relevant to hydrogen (hydride) storage, hydrogen purification by permeation, hydrogen isotope retention in plasma-facing materials, and hydrogenation catalysis. Emphasis is also placed on interactions of hydrogen with the micro- or defect structure in the volume of (nano-)materials that can induce drastic physical (mechanical or electrical) property changes but still lack adequate explanations.
In addition to welcoming all subject below, special highlights of the 2017 Session are direct detection techniques for hydrogen (diffusion) dynamics as well as hydrogen-induced electronic effects in semiconductor devices. Both experimentalists and theoreticians are strongly encouraged to participate.
Topics of the special session include:
- H-diffusion (surface and bulk)
- H in nanoparticles and thin films
- Hydrogenation catalysis
- Hydrogen permeation
- Electrochemistry, Fuel cell catalysis
- H-defect interactions
- H-induced vacancy formation and diffusion
- H impact on the tribology of surfaces
Special Session on HYDROGEN-RELATED KINETICS IN MATERIALS (SS10),
‘HYDROGEN TRANSPORTATION MECHANISM ACROSS METAL SURFACES REVEALED THROUGH THERMAL DESORPTION AND NUCLEAR REACTION ANALYSIS – FROM HYDROGEN ABSORPTION TO HYDROGENATION CATALYSIS´ – Prof. Markus Wilde, Institute of Industrial Science, The University of Tokyo, Japan
Other invited speakers:
- ‘HYDROGEN DISTRIBUTION IN NANO-SIZED METALS: HYDROGEN MICROSCOPY TECHNIQUES’ – Prof. Astrid Pundt, Universität Göttingen, Germany
- ‘HYDROGEN-RELATED RELIABILITY ISSUES IN ELECTRONIC DEVICES’ – Prof. Tibor Grasser, Vienna University of Technology, Austria
- ‘A COMPREHENSIVE PICTURE OF THE INTERACTION BETWEEN THE SURFACE AND THE BURIED INTERFACE IN SI FILM MATERIALS FROM THE VIEWPOINT OF HYDROGEN DIFFUSION’ – Dr. Ziyuan Liu, RIKEN, Japan
- ‘THERMAL AND NEUTRON DIFFRACTION STUDIES ON HYDROGEN ABSORPTION/DESORPTION PROCESSES IN METAL NANOPARTICLES’ – Dr. Hiroshi Akiba, The University of Tokyo, Japan
This post is a part of:
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:
- Hydrogen Embrittlement Group on LinkedIn
- Hydrogen Embrittlement – Understanding and research framework Project
- Hydrogen Embrittlement Group on Mendeley
- Hydrogen Embrittlement and Materials Science Blog on WordPress
- Research Topic titled “Hydrogen Embrittlement Mechanisms” (closed now) in collaboration with Frontiers in Materials Journal within Corrosion Research section
- Damage and Fracture Mechanism Group on LinkedIn
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