Intermediate temperature creep of directionally solidified Ni-based superalloy containing local recrystallization

被引：12
|
作者：
Xie, G. [1 ]
Wang, L. [1 ]
Zhang, J. [1 ,2 ]
Lou, L. H. [1 ]
机构：
[1] Chinese Acad Sci, Superalloys Div, Inst Met Res, Shenyang 110016, Peoples R China
[2] Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2011年 / 528卷 / 7-8期
基金：
中国国家自然科学基金;
关键词：
Recrystallization; Superalloy; Creep; Crack; Creep rupture life; SINGLE-CRYSTAL SUPERALLOY; NICKEL-BASED SUPERALLOY; SURFACE RECRYSTALLIZATION; BEHAVIOR; CMSX-4;
D O I：
10.1016/j.msea.2010.12.088
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Intermediate temperature creep of directionally solidified Ni-based superalloys containing local recrystallization (RX) was studied. A sharp reduction of the creep rupture life was observed with increasing the transverse RX area fraction on the cross section of the specimen. Creep curves of specimens containing local RX showed that the steady state creep stage was much shorter than that of the "good" specimens. The creep rates were also slightly higher when there was local RX. The creep and failure mechanism was discussed based on the dislocation morphology in the vicinity of the RX grain boundaries and the formation and propagation of cracks in the RX region according to the microstructure observation of the interrupted creep specimens. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码：3062 / 3068
页数：7
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