Interaction between crack and twins in TMS-82 superalloy during thermomechanical fatigue process

被引：1

作者：

Baidong Fu ^{[1
]}

Jianxin Zhang ^{[1
]}

HHarada ^{[2
]}

机构：

[1] Key Laboratory for Liquid-Solid Structural Evolution & Processing of Materials (Ministry of Education),Shandong University

[2] National Institute for Materials Science,-- Sengen

来源：

Progress in Natural Science:Materials International | 2013年 / 23卷 / 05期

关键词：

Twin; Crack; Formation energy; Stress eld; Nickel base superalloy;

D O I：

暂无

中图分类号：

TG132.32 [];

学科分类号：

080502 ;

摘要：

Thermomechanical fatigue behavior of a nickel base single crystal superalloy TMS-82 has been investigated.It was found that the micropores in the alloy tend to initiate large amounts of deformation twins and the crack causes many twins to occur during its propagation.It is postulated that these twins around the micropores or the crack are induced by the stress eld of the micropores or the crack tip,respectively.A thermodynamic model is adopted linking the twin formation energy with the stress eld around the crack tip,which explains the observed results with good consistency.The in uencing factors for a crack to stimulate twins around it are shown by the model,which might provide possible ways to enhance the alloy's thermomechanical fatigue performance.

引用

页码：508 / 513

页数：6

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