Effect of surface recrystallization on the creep rupture properties of a nickel-base single crystal superalloy

被引：76
|
作者：
Meng, Jie [1 ]
Jin, Tao [1 ,2 ]
Sun, Xiaofeng [1 ]
Hu, Zhuangqi [1 ]
机构：
[1] Chinese Acad Sci, Dept Superalloy, Inst Met Res, Shenyang 110016, Peoples R China
[2] Univ Sci & Technol, State Key Lab Adv Met & Mat, Beijing 100083, Peoples R China
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2010年 / 527卷 / 23期
基金：
中国国家自然科学基金;
关键词：
Nickel-base single crystal superalloy; Recrystallization; Creep; MICROSTRUCTURAL EVOLUTION; MECHANICAL-PROPERTIES; BOUNDARIES; BEHAVIOR; CMSX-2;
D O I：
10.1016/j.msea.2010.04.071
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The effect of recrystallization on the creep rupture properties of a nickel-base single crystal superalloy has been investigated. It has been found the creep rupture life decreases with increasing of recrystallized depth in the alloy deformed by shot peening. A number of secondary cracks, which link each other and separate the recrystallized region and the matrix, have been observed in the recrystallized alloy after creep rupture. Coarse gamma' precipitations have been found in the interface between the recrystallized grain boundary and the matrix. It pins the crack propagation along the recrystallized grain boundary. Twinning boundary, more stable than high angle grain boundary, is difficult to crack. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：6119 / 6122
页数：4
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