On the effect of hydrogen on plastic instabilities in metals

Y. Liang, P. Sofronis, N. Aravas

研究成果: ジャーナルへの寄稿学術誌査読

121 被引用数 (Scopus)

抄録

Experimental observations and theoretical calculations have demonstrated that hydrogen solute atoms increase the dislocation mobility in metals and alloys, thus promoting highly localized plastic processes which eventually lead to localized ductile rupture. While the underlying mechanism for hydrogen-enhanced dislocation mobility is well understood, little is known on how this mechanism acting at the microscale can lead to macroscopic plastic instability. In this paper, a theoretical investigation is carried out in a specimen under plane-strain tension in an effort to understand how hydrogen-induced softening and lattice dilatation at the microscale can lead to macroscopic i) shear localization (shear banding bifurcation) or ii) necking bifurcation.

本文言語英語
ページ(範囲)2717-2730
ページ数14
ジャーナルActa Materialia
51
9
DOI
出版ステータス出版済み - 5月 23 2003
外部発表はい

!!!All Science Journal Classification (ASJC) codes

  • 電子材料、光学材料、および磁性材料
  • セラミックおよび複合材料
  • ポリマーおよびプラスチック
  • 金属および合金

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