M5B3 Boride at the Grain Boundary of a Nickel-based Superalloy

被引：37

作者：

Du, Beining ^{[1
,2
,3
]}

Shi, Zhiwu ^{[1
]}

Yang, Jinxia ^{[1
]}

Chu, Zhaokuang ^{[1
]}

Cui, Chuanyong ^{[1
]}

Sun, Xiaofeng ^{[1
]}

Sheng, Liyuan ^{[2
,3
]}

Zheng, Yufeng ^{[2
,3
]}

机构：

[1] Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China

[2] Peking Univ, Beijing 100871, Peoples R China

[3] PKU HKUST ShenZhen Hong Kong Inst, Shenzhen 518057, Peoples R China

来源：

JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY | 2016年 / 32卷 / 03期

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

Nickel superalloy; Grain boundaries; Boride; Crystal structure; Intergrowth; Orientation relationship; ELECTRON-MICROSCOPY; BEHAVIOR; BORON; MICROSTRUCTURE; PRECIPITATION; CREEP; ZONE;

D O I：

10.1016/j.jmst.2015.11.010

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The grain boundary microstructures of a heat-treated Ni-based cast superalloy IN792 were investigated. The results show that M5B3 boride precipitates at the grain boundary. A special orientation relationship between M5B3 phase and the matrix at one side of the grain boundary is found. At the same time, two M5B3 borides with different orientations could co-exist in a single M5B3 particle as an intergrowth besides existing alone, thus forming orientation relationship between the two M5B3 phases and matrix. This phenomenon could be attributed to the special orientation relationship between M5B3 phase and the matrix. Copyright (C) 2015, The editorial office of Journal of Materials Science & Technology. Published by Elsevier Limited. All rights reserved.

引用

页码：265 / 270

页数：6

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