Three-dimensional geometry of "square-like" dislocation network in nickel-base single crystal superalloy

被引：23

作者：

Lv, Xianzi ^{[1
]}

Zhang, Jianxin ^{[1
]}

机构：

[1] Shandong Univ, Key Lab Liquid Solid Struct Evolut & Proc Mat, Minist Educ, Jinan 250061, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2016年 / 688卷

基金：

中国国家自然科学基金;

关键词：

Square-like" dislocation network; Nickel-base superalloy; Creep; Three-dimensional geometry; HRTEM; HIGH-TEMPERATURE CREEP; LOW-STRESS CREEP; NI-BASED SUPERALLOY; INTERFACIAL DISLOCATIONS; ELECTRON-MICROSCOPY; GAMMA'-PHASE; BEHAVIOR;

D O I：

10.1016/j.jallcom.2016.07.068

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Detailed characterizations of interfacial dislocation networks in a nickel-base single crystal superalloy after creep loading for 85 h at 1100 degrees Cand 130 MPa were carried out at larger magnifications. The "square-like" dislocation network is formed by dislocation reaction including a[010], a/2[110], a/2 [1 (1) over bar0] dislocations and is different from square ( and hexagonal) networks in formation mechanism and geometric structure. The atomic structure of core region of dislocations indicates their individual features and highlights the three-dimensional geometry of "square-like" dislocation network for the first time. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：449 / 455

页数：7

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