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CoCrxNi中熵合金组织及力学性能研究
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1.江西省金属材料微结构调控重点实验室(南昌航空大学);2.江西省金属材料微结构调控重点实验室南昌航空大学;3.江西机电职业技术学院机械工程学院

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江西省金属材料微结构调控重点实验室开放基金项目(项目号EJ201901430 )


Research on Microstructure and Mechanical Properties of CoCrxNi Medium-Entropy Alloy
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Jiangxi Province Key Laboratory of Metallic Material Microstructure Control(Nanchang Hangkong University)

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    摘要:

    本文以等原子比CoCrNi中熵合金为基础,采用真空电弧熔炼炉制备了CoCrxNi(x=1.0, 1.5, 1.6, 1.7, 1.8, 1.9, 2.0)中熵合金,研究了Cr元素含量对合金微观组织及力学性能的影响。结果表明:CoCrxNi(x=1.0, 1.5, 1.6)中熵合金为单一的面心立方相(FCC);随着Cr元素含量增加,CoCrxNi(x=1.7, 1.8, 1.9, 2.0)中熵合金的FCC相基体中析出了体心立方相的富Cr条状组织;合金的强度、硬度随着Cr元素含量的增加而不断提高,但塑性恶化;与等原子比CoCrNi中熵合金相比,CoCr1.7Ni中熵合金在保持较高塑性的同时,强度、硬度显著提高。

    Abstract:

    In this paper, based on the CoCrNi medium-entropy alloy with equal atomic ratio, the CoCrxNi (x=1.0, 1.5, 1.6, 1.7, 1.8, 1.9, 2.0) medium-entropy alloy was prepared by a vacuum arc melting furnace, and the effect of Cr element content on the alloy microstructure was studied. The influence of organization and mechanical properties. The results show that CoCrxNi (x=1.0, 1.5, 1.6) medium-entropy alloy is a single face-centered cubic phase (FCC); With the increase of Cr content, Cr rich strip structure of body centered cubic phase precipitated in FCC phase matrix of entropy alloy in CoCrxNi (x=1.7, 1.8, 1.9, 2.0) medium-entropy alloy; the strength and hardness of the alloy continue to increase with the increase of the Cr element content, but the plasticity deteriorates; compared with the equal atomic ratio CoCrNi medium entropy alloy, While maintaining high plasticity, the strength and hardness of CoCr1.7Ni medium-entropy alloy are significantly improved.

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舒小勇,邱盼盼,胡林丽,刘日,郭峰,杨斯蒙,俞峰,钟荣方. CoCrxNi中熵合金组织及力学性能研究[J].稀有金属材料与工程,2023,52(2):551~558.[Shu Xiaoyong, Qiu Panpan, Hu Linli, Liu Ri, Guo Feng, Yang Simeng, Yu Feng, Zhong Rongfang. Research on Microstructure and Mechanical Properties of CoCrxNi Medium-Entropy Alloy[J]. Rare Metal Materials and Engineering,2023,52(2):551~558.]
DOI:10.12442/j. issn.1002-185X.20211148

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历史
  • 收稿日期:2021-12-26
  • 最后修改日期:2022-02-12
  • 录用日期:2022-02-28
  • 在线发布日期: 2023-03-09
  • 出版日期: 2023-02-28