Flow behaviors and microstructural evolutions of a novel high-Co powder metallurgy superalloy during hot working
点击次数：
影响因子：
6.3
DOI码：
10.1016/j.jmatprotec.2018.06.039
所属单位：
中南大学粉末冶金研究院
发表刊物：
Journal of Materials Processing Technology
项目来源：
中国国家重点研究与发展计划（2016YFB0701404），中国国家自然科学基金（NSFC）（51401242），广东省推出的创新和创业团队项目（201301G0105337290），中南大学科学研究创业资金（202045001）
关键字：
Nickel-based superalloy, High Co content, Flow behaviors, Hot working condition, Abnormally large grains
摘要：
To understand how to tailor microstructure of high-Co polycrystalline superalloys during hot processing, the flow curves of a nickel-based superalloy with high Co content was quantitatively analyzed, and the microstructure evolution was studied by a high-throughput method. The results suggested that hot working conditions, especially the temperature, strongly influenced the grain structure at annealing. In specific, deforming under low strain rate and high temperature conditions facilitated the recovery and grain growth to consume the stored strain energy, furthermore, the weakened pinning effects of gamma' precipitates accelerated these procedures, which made the high-Co superalloy more vulnerable to the formation of abnormally large grains during subsequent supersolvus annealing.
合写作者：
Guoai He, Yunping Li, Yan Nie, Liang Jiang
第一作者：
谭黎明
论文类型：
Article
通讯作者：
Feng Liu
学科门类：
工学
一级学科：
冶金
卷号：
262
页面范围：
221-231
ISSN号：
0924-0136
是否译文：
否
学位：博士学位
职称：副研究员
学科：材料科学与工程
所在单位：粉末冶金研究院