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Journal of Materials Science

, Volume 43, Issue 3, pp 1166–1169 | Cite as

Atomistic simulation of the effects of hydrogen on the mobility of edge dislocation in alpha iron

  • Shinya Taketomi
  • Ryosuke Matsumoto
  • Noriyuki Miyazaki
Letter

Despite extensive investigations concerning hydrogen embrittlement mechanisms, not all the effects of hydrogen on material properties have been clarified. One of the effects of hydrogen is an enhancement of plasticity localisation and is known as the hydrogen enhanced localised plasticity (HELP) mechanism [1]. An in situ observation of the dislocations under a hydrogen gaseous environment was performed using a transmission electron microscope (TEM), which revealed the reduction of the distance between dislocations when hydrogen gas was added into the environmental cell [2, 3]. Such a plasticity localisation is observed in a large number of materials and slip systems [4]. Therefore, these experimental results are considered to be powerful evidence of HELP. Although the experimental observations show only the reduction of the distance between dislocations under a hydrogen gaseous environment, the precise reason for this reaction is still unclear. Elasticity analyses suggest that...

Keywords

Conjugate Gradient Method Hydrogen Embrittlement Edge Dislocation Dislocation Core Embed Atom Method 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgements

This research was performed as part of the Fundamental Research Project on Advanced Hydrogen Science funded by the New Energy and Industrial Technology Development Organization (NEDO). The research has also been partially supported by the ENEOS Hydrogen Trust Fund and the Ministry of Education, Science, Sports and Culture’s Grant-in-Aid for Young Scientists (A), 19686013, 2007.

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Copyright information

© Springer Science+Business Media, LLC 2008

Authors and Affiliations

  • Shinya Taketomi
    • 1
    • 2
  • Ryosuke Matsumoto
    • 1
    • 2
  • Noriyuki Miyazaki
    • 1
    • 2
  1. 1.Department of Mechanical Engineering and ScienceGraduate School of Engineering, Kyoto UniversitySakyo-kuJapan
  2. 2.Visiting ResearcherNational Institute of Advanced Industrial Science and Technology (AIST)TsukubaJapan

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