冷轧+退火对CoCrNi中熵合金显微组织和力学性能的影响

doi:10.13251/j.issn.0254-6051.2023.04.014

金属热处理 ›› 2023, Vol. 48 ›› Issue (4): 85-88.DOI: 10.13251/j.issn.0254-6051.2023.04.014

冷轧+退火对CoCrNi中熵合金显微组织和力学性能的影响

张明旭¹, 徐旺¹, 李涌泉^2,3, 董福元^1,3

1.北方民族大学材料科学与工程学院, 宁夏银川 750021;
2.北方民族大学机电工程学院, 宁夏银川 750021;
3.北方民族大学粉体材料与特种陶瓷重点实验室, 宁夏银川 750021

收稿日期:2022-09-29 修回日期:2023-01-03 发布日期:2023-05-27
通讯作者: 董福元,讲师,博士,E-mail: fydong@alum.imr.ac.cn
作者简介:张明旭(1996—),男,硕士研究生,主要研究方向为金属材料的强韧化,E-mail:mxzhang1203@163.com。
基金资助:
国家自然科学基金 (51901002);西部青年学者项目(XAB2021YW12);宁夏托举人才项目(TJGC2020142);北方民族大学研究生创新项目(YCX21121)

Effect of cold-rolling and annealing on microstructure and mechanical properties of CoCrNi medium-entropy alloy

Zhang Mingxu¹, Xu Wang¹, Li Yongquan^2,3, Dong Fuyuan^1,3

1. College of Materials Science and Engineering, North Minzu University, Yinchuan Ningxia 750021, China;
2. College of Mechanical and Electrical Engineering, North Minzu University, Yinchuan Ningxia 750021, China;
3. Key Laboratory of Powders and Advanced Ceramics, North Minzu University, Yinchuan Ningxia 750021, China

Received:2022-09-29 Revised:2023-01-03 Published:2023-05-27

摘要/Abstract

摘要： 研究了CoCrNi中熵合金分别经低温(-196 ℃)和室温(25 ℃)冷轧及分别700 ℃和800 ℃退火后的显微组织和力学性能。结果表明,合金经低温冷轧+700 ℃退火后具有优良的强度-韧性匹配,抗拉强度为1023 MPa,总延伸率为34%,相比于室温冷轧+700 ℃退火、低温冷轧+800 ℃退火和室温冷轧+800 ℃退火,其抗拉强度分别提高了16%、13%、37%,主要是由于试样内发生回复与再结晶产生退火孪晶,细化晶粒,减小位错密度,阻碍位错的移动,提高合金强度。

关键词: CoCrNi中熵合金, 冷轧, 退火, 力学性能, 显微组织

Abstract: Microstructure and mechanical properties of CoCrNi medium-entropy alloy were investigated after cold-rolling at cryogenic temperature (-196 ℃) and room temperature (25 ℃) and annealing at 700 ℃ and 800 ℃. The results show that the alloy has an excellent match of strength and toughness after cold-rolling at -196 ℃+annealing at 700 ℃, with tensile strength of 1023 MPa and total elongation of 34%. Compared with that after cold-rolling at 25 ℃ +annealing at 700 ℃, cold-rolling at 25 ℃ +annealing at 800 ℃, and cold-rolling at -196 ℃+annealing at 800 ℃, the tensile strength increases by 16%, 13% and 37%, respectively. This is mainly due to the annealing twins produced by recovery and recrystallization in the specimen, which refines the grain, reduces the dislocation density, hinders dislocation movement and improves the strength of the alloy.

Key words: CoCrNi medium-entropy alloy, cold-rolling, annealing, mechanical properties, microstructure

中图分类号:

TG156.25

张明旭, 徐旺, 李涌泉, 董福元. 冷轧+退火对CoCrNi中熵合金显微组织和力学性能的影响[J]. 金属热处理, 2023, 48(4): 85-88.

Zhang Mingxu, Xu Wang, Li Yongquan, Dong Fuyuan. Effect of cold-rolling and annealing on microstructure and mechanical properties of CoCrNi medium-entropy alloy[J]. Heat Treatment of Metals, 2023, 48(4): 85-88.

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冷轧+退火对CoCrNi中熵合金显微组织和力学性能的影响

Effect of cold-rolling and annealing on microstructure and mechanical properties of CoCrNi medium-entropy alloy

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