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International Hydrogen Conference (IHC 2012): Hydrogen-Materials Interactions

Editor
B. P. Somerday
B. P. Somerday
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P. Sofronis
P. Sofronis
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ISBN:
9780791860298
No. of Pages:
844
Publisher:
ASME Press
Publication date:
2014

Dislocation motion is highly regarded as a fundamental process of the deformation and the crack growth mechanisms in hydrogen embrittlement. In this study, the effect of hydrogen concentration on the Peierls potential for {112}<111> edge dislocation in alpha iron is investigated using atomistic calculations. The results show that softening and hardening occur at lower hydrogen concentrations and only hardening occurs under higher hydrogen concentrations. These facts suggest that the hydrogen embrittlement process differs depending on the hydrogen concentration in iron.

Introduction
Analysis Method
Analysis Results
Conclusions
References
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