Anomalous strengthening in a low-temperature aged FeMnCoCrN high-entropy alloy: Role of local chemical order

IF 5.8 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Journal of Alloys and Compounds Pub Date : 2025-03-31 DOI:10.1016/j.jallcom.2025.180091

Lifang Sun , Zhufeng He , Shuang Jiang , Xinyu Wang , Jintao Zhao , Yuliang Yang , Ye Yuan , Yunjie Li , Nan Jia

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Abstract

As an intrinsic microstructural feature of medium- and high-entropy alloys (M/HEAs), local chemical order (LCO) shows a great potential in regulating mechanical properties of those materials. In this study, LCO domains ranging in size from sub-nanometer to several nanometers were obtained in FeMnCoCrN HEA by long-term low-temperature aging, achieving a simultaneous improvement of tensile strength and ductility. The significant strengthening induced by LCO domains can compensate for the loss in strength caused by recovery, leading to an impressive strengthening of the alloy. Moreover, the non-uniform distribution of LCO domains provides an additional hardening induced by heterogeneous deformation, enhancing the work hardening ability and uniform deformation. These findings reveal the quantitative impact of LCO on the mechanical property of M/HEAs, which provides valuable insights for the design and development of high-performance metallic materials.

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来源期刊

Journal of Alloys and Compounds 工程技术-材料科学：综合

CiteScore

11.10

自引率

14.50%

发文量

5146

审稿时长

67 days

期刊介绍： The Journal of Alloys and Compounds is intended to serve as an international medium for the publication of work on solid materials comprising compounds as well as alloys. Its great strength lies in the diversity of discipline which it encompasses, drawing together results from materials science, solid-state chemistry and physics.