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

被引：8
|
作者：
Fu, Baidong [1 ]
Zhang, Jianxin [1 ]
Harada, H. [2 ]
机构：
[1] Shandong Univ, Minist Educ, Key Lab Liquid Solid Struct Evolut & Proc Mat, Jinan 250061, Shandong, Peoples R China
[2] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050047, Japan
来源：
PROGRESS IN NATURAL SCIENCE-MATERIALS INTERNATIONAL | 2013年 / 23卷 / 05期
基金：
中国国家自然科学基金; 中国博士后科学基金;
关键词：
Twin; Crack; Formation energy; Stress field; Nickel base superalloy; LOW-CYCLE FATIGUE; SINGLE-CRYSTAL SUPERALLOY; NICKEL-BASED SUPERALLOY; NI-BASED SUPERALLOY; HIGH-TEMPERATURE; DEFORMATION; BEHAVIOR; GAMMA'-NI3AL; MECHANISMS; DAMAGE;
D O I：
10.1016/j.pnsc.2013.09.005
中图分类号：
T [工业技术];
学科分类号：
08 ;
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 field of the micropores or the crack tip, respectively. A thermodynamic model is adopted linking the twin formation energy with the stress field around the crack tip, which explains the observed results with good consistency. The influencing 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. (C) 2013 Chinese Materials Research Society. Production and hosting by Elsevier B.V. All rights reserved.
引用
收藏
页码：508 / 513
页数：6
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