Impact Factor:6.3
DOI number:10.1016/j.jmatprotec.2018.06.039
Affiliation of Author(s):中南大学粉末冶金研究院
Teaching and Research Group:高温结构材料研究所
Journal:Journal of Materials Processing Technology
Funded by: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）
Key Words:Nickel-based superalloy, High Co content, Flow behaviors, Hot working condition, Abnormally large grains
Abstract: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.
Co-author:Guoai He, Yunping Li, Yan Nie, Liang Jiang
First Author:Liming Tan
Indexed by:Article
Correspondence Author:Feng Liu
Discipline:Engineering
First-Level Discipline:冶金
Volume:262
Page Number:221-231
ISSN No.:0924-0136
Translation or Not:no