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

• 工艺研究 • 上一篇    下一篇

退火对AlCuFeNiTiCrx高熵合金硬度的影响

张晓蓉, 尚华龙   

  1. 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 AlCuFeNiTiCrx high entropy alloys

Zhang Xiaorong, Shang Hualong   

  1. 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: 采用铜模吸铸法制备AlCuFeNiTiCrx(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AlCuFeNiTiCrx(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: AlCuFeNiTiCrx(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 AlCuFeNiTiCrx(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: