退火对AlCuFeNiTiCrx高熵合金硬度的影响

doi:10.13251/j.issn.0254-6051.2023.02.026

金属热处理 ›› 2023, Vol. 48 ›› Issue (2): 170-173.DOI: 10.13251/j.issn.0254-6051.2023.02.026

退火对AlCuFeNiTiCr_x高熵合金硬度的影响

张晓蓉, 尚华龙

山东工程职业技术大学交通学院, 山东济南 250200

收稿日期:2022-09-11 修回日期:2022-12-11 出版日期:2023-02-25 发布日期:2023-03-22
作者简介:张晓蓉(1990—),女,讲师,硕士,主要研究方向为新型金属材料的制备及热处理工艺,组织结构及性能的变化,E-mail:289331017@qq.com
基金资助:
山东工程职业技术大学校内科研基金

Effect of annealing on microstructure and hardness of AlCuFeNiTiCr_x high entropy alloys

Zhang Xiaorong, Shang Hualong

College of Transportation, Shandong University of Engineering and Vocational Technology, Jinan Shandong 250200, China

Received:2022-09-11 Revised:2022-12-11 Online:2023-02-25 Published:2023-03-22

摘要/Abstract

摘要： 采用铜模吸铸法制备AlCuFeNiTiCr_x(x=0.5, 1.0, 1.5, 2.0)高熵合金,并在1000 ℃下进行3 h退火处理。通过X射线衍射仪(XRD)、光学显微镜、维氏硬度计,分别测试了铸态和退火态AlCuFeNiTiCr_x(x=0.5, 1.0, 1.5, 2.0)高熵合金的微观结构演变及维氏硬度值。发现铸态和退火态试样仅由简单的体心立方(BCC)和面心立方(FCC)固溶体相组成,而退火态试样中的FCC相与铸态试样中的FCC相相比有所增加。根据金相显微照片,两种状态下的高熵合金仅存在枝晶和晶间相,且退火后的显微组织变得更加均匀。两种状态下高熵合金的硬度均随Cr含量的增加而增加,且退火态试样的硬度值远大于铸态试样。

关键词: 高熵合金, 退火, 微观结构, 硬度

Abstract: AlCuFeNiTiCr_x(x=0.5, 1.0, 1.5, 2.0) high entropy alloys were prepared by copper mold suction casting method, then the specimens were annealed at 1000 ℃ for 3 h. Microstructure evolution and hardness of as-cast and as-annealed AlCuFeNiTiCr_x(x=0.5, 1.0, 1.5, 2.0) alloys were tested by X-ray diffraction (XRD), optical microscope, Vickers hardness tester, respectively. It is found that both of the as-cast and the as-annealed specimens consist only simple body-centered cubic (BCC) and face-centered cubic (FCC) solid solution phases, while the FCC phase in the as-annealed specimens increases compared with that in the as-cast specimens. There are only dendrite and interdendrite phases for both the as-cast and the as-annealed alloys, though the microstructure becomes more homogeneous after annealing according to the metallographical micrographs. The hardness increases with the increase of Cr content, and the as-annealed hardness values are much higher than the as-cast ones because the increase of FCC phase in the as-annealed specimens.

Key words: high entropy alloys(HEAs), annealing, microstructure, hardness

中图分类号:

张晓蓉, 尚华龙. 退火对AlCuFeNiTiCr_x高熵合金硬度的影响[J]. 金属热处理, 2023, 48(2): 170-173.

Zhang Xiaorong, Shang Hualong. Effect of annealing on microstructure and hardness of AlCuFeNiTiCr_x high entropy alloys[J]. Heat Treatment of Metals, 2023, 48(2): 170-173.

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退火对AlCuFeNiTiCr_x高熵合金硬度的影响

Effect of annealing on microstructure and hardness of AlCuFeNiTiCr_x high entropy alloys

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退火对AlCuFeNiTiCrx高熵合金硬度的影响

Effect of annealing on microstructure and hardness of AlCuFeNiTiCrx high entropy alloys

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退火对AlCuFeNiTiCr_x高熵合金硬度的影响

Effect of annealing on microstructure and hardness of AlCuFeNiTiCr_x high entropy alloys