退火处理对3D打印CoCrFeMnNi高熵合金组织和性能的影响

doi:10.13251/j.issn.0254-6051.2021.08.036

金属热处理 ›› 2021, Vol. 46 ›› Issue (8): 192-196.DOI: 10.13251/j.issn.0254-6051.2021.08.036

退火处理对3D打印CoCrFeMnNi高熵合金组织和性能的影响

吴颖¹, 曾强¹, 肖辉进¹, 朱绍维²

1.四川文理学院智能制造学院, 四川达州 635000;
2.成都飞机工业(集团)有限责任公司, 四川成都 610092

收稿日期:2021-04-05 出版日期:2021-08-25 发布日期:2021-12-09
通讯作者: 曾强,副教授,硕士,E-mail:luofang1022@163.com
作者简介:吴颖(1987—),女,讲师,硕士,主要研究方向为金属材料成形工艺及热处理,E-mail:wuying0725@163.com。
基金资助:
国家科技重大专项(2014ZX04014-031) ;四川文理学院研究基地及平台专项(2019PT003Y)

Effect of annealing treatment on microstructure and properties of 3D printed CoCrFeMnNi high-entropy alloy

Wu Ying¹, Zeng Qiang¹, Xiao Huijin¹, Zhu Shaowei²

1. School of Intelligent Manufacturing, Sichuan University of Arts and Science, Dazhou Sichuan 635000, China;
2. Chengdu Aircraft Industrial(Group) Co., Ltd., Chengdu Sichuan 610092, China

Received:2021-04-05 Online:2021-08-25 Published:2021-12-09

摘要/Abstract

摘要： 采用选区激光熔化(SLM)工艺制备了等原子比CoCrFeMnNi高熵合金,并对试验合金分别进行了650 ℃×1 h和900 ℃×1 h的退火处理。结合微观组织分析、拉伸性能分析和断裂特征分析,研究了退火工艺对SLM制备的CoCrFeMnNi高熵合金组织和力学性能的影响。结果表明:打印态试样屈服强度、抗拉强度和伸长率分别为672 MPa、751 MPa和34.3%。650 ℃×1 h退火处理后,屈服强度、抗拉强度和伸长率略微降低,分别为583 MPa、718 MPa和33.5%。900 ℃×1 h退火处理后屈服强度和抗拉强度分别降低至494 MPa和707 MPa,伸长率提高至46.6%。断口呈典型的韧窝特征,变形机制均为纳米孪生。

关键词: 选区激光熔化, CoCrFeMnNi高熵合金, 退火处理, 组织, 拉伸性能

Abstract: Equimolar CoCrFeMnNi high-entropy alloy (HEA) was prepared by using selective laser melting (SLM) process, and the tested alloy was annealed at 650 ℃ and 900 ℃ for 1 h, respectively. Combined with microstructure, tensile properties and fracture characteristics analysis, effect of annealing process on microstructure and mechanical properties of CoCrFeMnNi HEA prepared by SLM was studied. The results show that the yield strength, tensile strength and elongation of the as-printed specimen are 672 MPa, 751 MPa and 34.3%, respectively. After annealing at 650 ℃ for 1 h, the yield strength, tensile strength and elongation decrease slightly, which are 583 MPa, 718 MPa and 33.5%, respectively. After annealing at 900 ℃ for 1 h, the yield strength and tensile strength decrease to 494 MPa and 707 MPa, respectively, while the elongation increases to 46.6%.The fracture surface shows typical dimple characteristics, and the deformation mechanism is nano-twinning.

Key words: selective laser melting, CoCrFeMnNi high-entropy alloy, annealing treatment, microstructure, tensile properties

中图分类号:

TG142.1

吴颖, 曾强, 肖辉进, 朱绍维. 退火处理对3D打印CoCrFeMnNi高熵合金组织和性能的影响[J]. 金属热处理, 2021, 46(8): 192-196.

Wu Ying, Zeng Qiang, Xiao Huijin, Zhu Shaowei. Effect of annealing treatment on microstructure and properties of 3D printed CoCrFeMnNi high-entropy alloy[J]. Heat Treatment of Metals, 2021, 46(8): 192-196.

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退火处理对3D打印CoCrFeMnNi高熵合金组织和性能的影响

Effect of annealing treatment on microstructure and properties of 3D printed CoCrFeMnNi high-entropy alloy

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