Directional dependence of corrosion fatigue of iron-silicon bicrystals

Acta Metallurgica et Materialia Pub Date : 1995-10-01 DOI:10.1016/0956-7151(95)90167-1

Jian-Sheng Wang, Sinisa Dj. Mesarovic

引用次数: 16

Abstract

A directional dependence of the corrosion fatigue behavior of Fe-2.7wt%Si alloy Σ5[100]/(021) bicrystals was observed in a film forming solution. To understand this directional dependence, dislocation nucleation analyses at the opposite crack tips based on the Rice-Thomson concept and continuum elastic-plastic analyses, within single crystal theory, of the near tip fields by finite element method were performed. Explanations of brittle/ductile fatigue crack growth under corrosive conditions and the local crack tip rotation within the interface are offered based on these analyses.

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铁硅双晶腐蚀疲劳的方向依赖性

在成膜溶液中观察到Fe-2.7wt%Si合金Σ5[100]/(021)双晶腐蚀疲劳行为的方向依赖性。为了理解这种方向依赖性，基于Rice-Thomson概念和单晶理论的连续弹塑性分析，用有限元法对近尖端场进行了相反尖端的位错成核分析。在此基础上，给出了腐蚀条件下脆性/韧性疲劳裂纹扩展和界面内局部裂纹尖端旋转的解释。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Acta Metallurgica et Materialia

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