Kinetics and microstructural evolution during recrystallization of a single crystal superalloy

被引：9

作者：

Zhuo, Longchao ^{[1
]}

Liang, Shuhua ^{[1
]}

Wang, Feng ^{[2
]}

Xu, Tao ^{[3
]}

Wang, Yanlin ^{[4
]}

Yuan, Zhangxiao ^{[1
]}

Xiong, Jichun ^{[5
]}

Li, Jiarong ^{[5
]}

Zhu, Jing ^{[2
]}

机构：

[1] Xian Univ Technol, Sch Mat Sci & Engn, Xian 710048, Peoples R China

[2] Tsinghua Univ, Sch Mat Sci & Engn, Natl Ctr Electron Microscopy Beijing, Beijing 100084, Peoples R China

[3] Beihang Univ, Dept Mat Sci & Engn, Key Lab Aerosp Mat & Performance, Minist Educ, Beijing 100191, Peoples R China

[4] Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing 100083, Peoples R China

[5] Beijing Inst Aeronaut Mat, Sci & Technol Adv High Temp Struct Mat Lab, Beijing 100095, Peoples R China

来源：

MATERIALS CHARACTERIZATION | 2015年 / 108卷

基金：

中国国家自然科学基金;

关键词：

Superalloys; Electron microscopy; Recrystallization; Grain boundaries; SURFACE RECRYSTALLIZATION; HEAT-TREATMENT; BEHAVIOR; TEXTURE; F.C.C;

D O I：

10.1016/j.matchar.2015.07.027

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The kinetical recrystallization behaviors over wide ranges of annealing temperature of 1100-1200 degrees C and annealing time range of 0.5-16 h of a second-generation single-crystal superalloy have been investigated by combined model simulation, TEM and EBSD techniques. The kinetics represented by Johnson-Mehl-Avrami and Arrhenius equations revealed its complicated diffusion-controlled mechanism. With increasing annealing temperature and time, the recrystallized grain size exhibited a steady increasing tendency, and gradually, the subgrain boundaries in the original matrix were consumed and replaced by high angle grain boundaries, leading to improved Schmid factor. The dominant fraction of twins in the resultant microstructure indicated its significant role in strain energy dissipation, facilitating the complete progress of recrystallization. (C) 2015 Elsevier Inc. All rights reserved.

引用

页码：16 / 21

页数：6

共 21 条

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