Impact Factor:6.2
DOI number:10.1016/j.jallcom.2019.152382
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 Alloys and Compounds
Funded by:中南大学高性能复合体制造国家重点实验室项目（ZZYJKT2019-04），中南大学科学研究初始资金（202045001），中国国家自然科学基金（NSFC）（51901247），中南大学基本研究基金（ 2019zzts526）
Key Words:Medium entropy alloy, Hot deformation, Continuous dynamic recrystallization, Grain refinement
Abstract:With promising mechanical properties, the newly developed medium-entropy alloy (MEA) has aroused widespread interest recently. Plastic deformation processes including hot working are usually adopted to refine the grain of many alloys and thereby enhance the strength, hardness, and wear resistance at low temperatures. So far, few discoveries have reported the mechanism of grain refinement during hot deformation on MEA, especially for CrCoNi. In this article, plastic deformation at different conditions was intentionally designed to uncover the underlying mechanism of grain refinement in CrCoNi MEA alloy. Unlike many other alloys with low stacking fault energy, the occurrence of continuous dynamic recrystallization during hot deformation of CrCoNi alloy has been unexpectedly discovered, which is proved as the dominating mechanism for grain refinement of the current alloy. (C) 2019 Elsevier B.V. All rights reserved.
Co-author:Yifan Zhao, Bin Gan, Xiaofei Sheng, Yu Liu
First Author:Guoai He
Indexed by:Article
Correspondence Author:Liming Tan
Document Code:152382
Discipline:Engineering
First-Level Discipline:冶金
Volume:815
ISSN No.:0925-8388
Translation or Not:no