Nucleation mechanisms of dynamic recrystallization for G3 alloy during hot compression

被引：0
|
作者：
Jue Wang [1 ,2 ]
Jian-Xin Dong [3 ]
Mai-Cang Zhang [3 ]
机构：
[1] Jiangsu Key Laboratory of Advanced Structural Materials and Application Technology
[2] School of Materials Science and Engineering,Nanjing Institute of Technology
[3] School of Materials Science and Engineering,University of Science and Technology Beijing
来源：
Rare Metals | 2016年 / 35卷 / 07期
基金：
中国国家自然科学基金;
关键词：
G3; alloy; Dynamic recrystallization; Nucleation mechanism; Annealing twins;
D O I：
暂无
中图分类号：
TG133.4 [];
学科分类号：
080502 ;
摘要：
Dynamic recrystallization(DRX) mechanisms of a nickel-based corrosion-resistant alloy, G3, were investigated by hot compression tests with temperatures from 1050 to 1200 ℃ and strain rates from 0.1 to 5.0 s-1.Deformation microstructure was observed at the strain from 0.05 to 0.75 by electron backscatter diffraction(EBSD) and transmission electron microscope(TEM).Work hardening rate curves were calculated to analyze the effect of deformation parameters on the nucleation process.Results indicate that strain-induced grain boundary migration is the principal mechanism of DRX. Large annealing twins promote nucleation by accumulating dislocations and fragmenting into cell blocks. Continuous dynamic recrystallization is also detected to be an effective supplement mechanism, especially at low temperature and high strain rate.
引用
收藏
页码：543 / 550
页数：8
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