退火温度对冷轧态CoCrFeNi高熵合金力学性能的影响

doi:10.13251/j.issn.0254-6051.2025.02.020

金属热处理 ›› 2025, Vol. 50 ›› Issue (2): 128-132.DOI: 10.13251/j.issn.0254-6051.2025.02.020

退火温度对冷轧态CoCrFeNi高熵合金力学性能的影响

姜梦媛¹, 吴振楠¹, 吴成博¹, 徐旺¹, 李宁^1,2,3, 董福元^1,2,3

1.北方民族大学材料科学与工程学院, 宁夏银川 750021;
2.碳基先进陶瓷制备技术国家地方联合工程研究中心, 宁夏银川 750021;
3.粉体材料与特种陶瓷省部共建重点实验室, 宁夏银川 750021

收稿日期:2024-08-11 修回日期:2024-12-26 发布日期:2025-04-10
通讯作者: 董福元,副教授,博士,E-mail:fydong@alum.imr.ac.cn
作者简介:姜梦媛(2000—),女,硕士研究生,主要研究方向高熵合金的显微组织及力学性能,E-mail:jmengyuan2023@163.com。
基金资助:
宁夏自然科学基金(2023AAC03289);宁夏重点研发项目(引才专项)(20022BSB03077);北方民族大学研究生创新项目(YCX24310);西部青年学者项目(XAB2021YW12)

Effect of annealing temperature on mechanical properties of cold-rolled CoCrFeNi high entropy alloy

Jiang Mengyuan¹, Wu Zhennan¹, Wu Chengbo¹, Xu Wang¹, Li Ning^1,2,3, Dong Fuyuan^1,2,3

1. School of Materials Science and Engineering, North Minzu University, Yinchuan Ningxia 750021, China;
2. National and Local Joint Engineering Research Center of Advanced Carbon-Based Ceramics Preparation Technology, Yinchuan Ningxia 750021, China;
3. Key Lab of Powder Material & Advanced Ceramics, Yinchuan Ningxia 750021, China

Received:2024-08-11 Revised:2024-12-26 Published:2025-04-10

摘要/Abstract

摘要： 采用真空感应熔炼铸造法制备了CoCrFeNi高熵合金,系统研究了不同退火温度对-196 ℃低温冷轧和室温轧制态CoCrFeNi高熵合金力学性能的影响。结果表明,冷变形和退火后的CoCrFeNi高熵合金中均仅有FCC相;断裂总延伸率和均匀延伸率随退火温度升高而升高,抗拉强度随退火温度升高而降低,其中700 ℃退火时两种冷轧态合金均拥有良好的强度-塑性匹配。在相同退火温度下,低温冷轧合金的强度高于室温轧制的合金。铸态CoCrFeNi高熵合金断面上分布着大量的韧窝;两种轧制态下CoCrFeNi高熵合金的断面韧窝少且浅,局部未出现韧窝;随着退火温度增加,韧窝尺寸变大,孔洞数量有所增加。

关键词: CoCrFeNi高熵合金, 冷轧, 退火, 力学性能

Abstract: A CoCrFeNi high entropy alloy was prepared by vacuum induction melting casting method, and the effect of different annealing temperatures on the mechanical properties of the CoCrFeNi high entropy alloy in -196 ℃ cryogenic rolling and room temperature rolling states was systematically studied. The results indicate that there is only FCC phase in the CoCrFeNi high entropy alloy in all the cold rolled and annealed states, and the percentage total extension at fracture and uniform elongation increase with the increase of annealing temperature, while the tensile strength decreases. Among them, the alloy in both the cold-rolled states has a good strength plasticity matching when annealed at 700 ℃. At the same annealing temperature, the strength of cryogenic rolled alloy is higher than that of alloy rolled at room temperature. There are numerous dimples distributed on the fracture of the as-cast CoCrFeNi high entropy alloy. The dimples on the fracture of the CoCrFeNi high entropy alloy in the two rolling states are few and shallow, and no dimple appears in some locations. As the annealing temperature increases, the size of the dimples increases and the number of pores increases.

Key words: CoCrFeNi high entropy alloy, cold rolling, annealing, mechanical properties

中图分类号:

TG156.25

姜梦媛, 吴振楠, 吴成博, 徐旺, 李宁, 董福元. 退火温度对冷轧态CoCrFeNi高熵合金力学性能的影响[J]. 金属热处理, 2025, 50(2): 128-132.

Jiang Mengyuan, Wu Zhennan, Wu Chengbo, Xu Wang, Li Ning, Dong Fuyuan. Effect of annealing temperature on mechanical properties of cold-rolled CoCrFeNi high entropy alloy[J]. Heat Treatment of Metals, 2025, 50(2): 128-132.

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退火温度对冷轧态CoCrFeNi高熵合金力学性能的影响

Effect of annealing temperature on mechanical properties of cold-rolled CoCrFeNi high entropy alloy

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