Microstructural evolution of a directionally solidified nickel-base superalloy during thermal fatigue

被引：3
|
作者：
Xia Pengcheng [1 ,2 ]
Yang Lei [1 ]
Yu Jinjiang [2 ]
Sun Xiaofeng [2 ]
Guan Hengrong [2 ]
Hu Zhuangqi [2 ]
机构：
[1] Shandong Univ Sci & Technol, Sch Mat Sci & Engn, Qingdao 266510, Peoples R China
[2] Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
来源：
RARE METALS | 2011年 / 30卷
基金：
中国国家自然科学基金;
关键词：
nickel-base superalloy; thermal fatigue; gamma ' rafting; dislocations; CREEP; BEHAVIOR; EXPOSURE;
D O I：
10.1007/s12598-011-0328-z
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The transition of gamma' phase and dislocation during thermal fatigue test was investigated. There is gamma' denuded region in two sides and the tip of thermal fatigue crack because of oxidation during thermal fatigue test. gamma' phase coarsens and rafts. The direction of gamma' rafting is perpendicular to the orientation of crystal growth. High density dislocations are found near crack. Single dislocation moves in the matrix apart from crack. A few dislocations shear gamma' phase because of relatively low strength of gamma' phase at high temperature.
引用
收藏
页码：477 / 481
页数：5
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