期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 815, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2019.152382
关键词
Medium entropy alloy; Hot deformation; Continuous dynamic recrystallization; Grain refinement
资金
- Project of State Key Laboratory of High Performance Complex Manufacturing, Central South University [ZZYJKT2019-04]
- scientific research initial funding of Central South University [202045001]
- National Natural Science Foundation of China [51901247]
- Fundamental Reasearch Funds for the Central Univeristies of Central South University [2019zzts526]
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.
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