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

IF 3.9 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

{"title":"The influence of strain rates on the microstructural characteristics of CoCrFeNiMn high-entropy alloys during compression at elevated temperature","authors":"Qiang Li, Mingxia Wu, Maorui Yan, Ling Xue, Kai Tang, Changyan Gao, Yi Yang, Jian Liu","doi":"10.1007/s10853-025-10762-4","DOIUrl":null,"url":null,"abstract":"<div><p>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<sup>−1</sup> to 10 s<sup>−1</sup>). 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 b<sup>3</sup> 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.</p></div>","PeriodicalId":645,"journal":{"name":"Journal of Materials Science","volume":"60 11","pages":"5247 - 5266"},"PeriodicalIF":3.9000,"publicationDate":"2025-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Materials Science","FirstCategoryId":"88","ListUrlMain":"https://link.springer.com/article/10.1007/s10853-025-10762-4","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}

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.

查看原文

微信好友朋友圈 QQ好友复制链接

本刊更多论文

应变速率对CoCrFeNiMn高熵合金高温压缩组织特征的影响

在极端条件下，高熵合金的微观组织和变形行为是决定其动态响应的重要因素。在这项工作中，通过在750°C， 850°C， 950°C和1050°C下进行不同应变速率（从0.01 s−1到10 s−1）的压缩试验，研究了铸态等原子CoCrFeNiMn HEA。研究了CoCrFeNiMn HEA在950℃下真应变为0.5时的显微组织特征和变形行为。计算得到的热压缩应变率灵敏度、有效体积和活化能分别为0.1083、45.1 b3和264.92 kJ/mol。在高温压缩过程中，位错、孪晶、恢复、变形和再结晶属性的综合影响降低了数值。在750℃~ 1050℃范围内建立了Arrhenius本构模型的流变应力曲线。新建立的arrhenius型模型在实验应力和预测应力之间具有较好的拟合性。通过对CoCrFeNiMn HEA的微观组织演变、变形行为和极端情况下的本构模型的分析，为CoCrFeNiMn HEA的新制造技术的发展提供了重要的见解。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文去求助

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.