The influence of strain rates on the microstructural characteristics of CoCrFeNiMn high-entropy alloys during compression at elevated temperature

IF 3.5 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Journal of Materials Science Pub Date : 2025-03-10 DOI:10.1007/s10853-025-10762-4

Qiang Li, Mingxia Wu, Maorui Yan, Ling Xue, Kai Tang, Changyan Gao, Yi Yang, Jian Liu

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引用次数: 0

Abstract

The microstructure and deformation behavior are important factors in determining dynamic response for high-entropy alloy (HEA) under extreme conditions. In this work, an as-cast equiatomic CoCrFeNiMn HEA was investigated through compression test conduct at 750 °C, 850 °C, 950 °C and 1050 °C subjected to various strain rates (from 0.01 s⁻¹ to 10 s⁻¹). Microstructural characteristics and deformation behavior of CoCrFeNiMn HEA during hot compression of true strain of 0.5 at 950 °C were studied. The calculated strain rate sensitivity, active volume and activation energy for hot compression were 0.1083, 45.1 b³ and 264.92 kJ/mol, respectively. The combined effects of dislocations, twins, recovery, deformation, and recrystallization attributes to lower values during high-temperature compression. In addition, the flow stress curves were developed an Arrhenius constitutive model from 750 °C to 1050 °C. The new developed Arrhenius-type model exhibited better fit between the experimental and predicted stress. Through the analysis of microstructure evolution, deformation behavior and the constitutive model under extreme situation provide critical insights for the development of new manufacturing techniques into CoCrFeNiMn HEA.

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来源期刊

Journal of Materials Science 工程技术-材料科学：综合

CiteScore

7.90

自引率

4.40%

发文量

1297

审稿时长

2.4 months

期刊介绍： The Journal of Materials Science publishes reviews, full-length papers, and short Communications recording original research results on, or techniques for studying the relationship between structure, properties, and uses of materials. The subjects are seen from international and interdisciplinary perspectives covering areas including metals, ceramics, glasses, polymers, electrical materials, composite materials, fibers, nanostructured materials, nanocomposites, and biological and biomedical materials. The Journal of Materials Science is now firmly established as the leading source of primary communication for scientists investigating the structure and properties of all engineering materials.