Observation of a[100] Dislocations in the γ′ Phase in a [011]-Oriented Nickel-Base Single Crystal Superalloy During High Temperature Creep

被引：1
|
作者：
Li, Yifei [1 ,2 ]
Wang, Li [3 ]
Zhang, Gong [3 ]
Lou, Langhong [3 ]
机构：
[1] Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China
[2] Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Anhui, Peoples R China
[3] Chinese Acad Sci, Inst Met Res, Beijing, Peoples R China
来源：
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 2019年 / 50A卷 / 11期
基金：
中国国家自然科学基金;
关键词：
LOW-STRESS CREEP; MICROSTRUCTURE EVOLUTION; ANISOTROPIC CREEP; CONFIGURATION;
D O I：
10.1007/s11661-019-05432-5
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Superdislocation configurations in a [011]-oriented single crystal superalloy after creep at 1100 degrees C/150 MPa have been investigated. Besides a < 110 > superdislocations, a[100] superdislocations are observed. TEM analysis shows that these a[100] superdislocations are pure edge dislocations and mainly lie on (100) plane with < 011 > directions. They form by the reactions of two matrix dislocations with different Burgers vectors, and they may move in a similar way to a < 100 > dislocations in [001] specimens owing to the zero Schmid factors. (C) The Minerals, Metals & Materials Society and ASM International 2019
引用
收藏
页码：4965 / 4969
页数：5
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