La添加对FeMnCrNiCo高熵合金铸态组织及硬度的影响

doi:10.13251/j.issn.0254-6051.2021.03.024

金属热处理 ›› 2021, Vol. 46 ›› Issue (3): 116-120.DOI: 10.13251/j.issn.0254-6051.2021.03.024

La添加对FeMnCrNiCo高熵合金铸态组织及硬度的影响

董方¹, 毛宁¹, 瞿伟²

1.内蒙古科技大学材料与冶金学院, 内蒙古包头 014010;
2.内蒙古自治区白云鄂博矿多金属资源综合利用省部共建国家重点实验室, 内蒙古包头 014010

收稿日期:2020-11-27 出版日期:2021-03-25 发布日期:2021-05-08
通讯作者: 瞿伟,讲师,博士,E-mail:qwandzls@126.com
作者简介:董方(1964—),男,教授,硕士,主要研究方向为钢铁冶金新工艺新技术及金属材料,E-mail:maoning234@163.com。

Effect of La addition on as-cast microstructure and hardness ofFeMnCrNiCo high entropy alloy

Dong Fang¹, Mao Ning¹, Qu Wei²

1. School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou Inner Mongolia 014010, China;
2. Key Laboratory of Integrated Exploitation of Bayan Obo Multi-Metal Resources, Baotou Inner Mongolia 014010, China

Received:2020-11-27 Online:2021-03-25 Published:2021-05-08

摘要/Abstract

摘要： 研究了La的添加对FeMnCrNiCo高熵合金(HEAs)铸态组织及硬度的影响,借助XRD、OM、EDS和维氏硬度计分别对FeMnCrNiCo和FeMnCrNiCoLa_0.2高熵合金的微观组织及硬度进行了对比分析。研究表明:添加La后,合金的枝晶细化了49.1%,同时由fcc单相固溶体结构变为fcc相和LaNi相的两相结构,LaNi相呈连续大面积分布于枝晶间;添加La后,枝晶间脆硬的LaNi相以及组织的细化使合金的硬度提高了37%。

关键词: 高熵合金, La, 微观组织, 硬度

Abstract: Effect of La addition on as-cast microstructure and hardness of FeMnCrNiCo high entropy alloys (HEAs) was investigated. The microstructure and hardness of the FeMnCrNiCo and FeMnCrNiCoLa_0.2 HEAs were analyzed by means of XRD, OM, EDS and Vickers hardness tester. The results show that with the addition of La, the dendrite of the HEA is refined by 49.1%, and the phase structure changes from a single fcc solid solution to the composite structure containing fcc phase and LaNi phase, and the brittle LaNi phase distributes continuously in the interdendrite region. The brittle LaNi compound and grain refinement increase the hardness of the alloy by 37%.

Key words: high entropy alloy, La, microstructure, hardness

中图分类号:

TG146.1

董方, 毛宁, 瞿伟. La添加对FeMnCrNiCo高熵合金铸态组织及硬度的影响[J]. 金属热处理, 2021, 46(3): 116-120.

Dong Fang, Mao Ning, Qu Wei. Effect of La addition on as-cast microstructure and hardness ofFeMnCrNiCo high entropy alloy[J]. Heat Treatment of Metals, 2021, 46(3): 116-120.

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La添加对FeMnCrNiCo高熵合金铸态组织及硬度的影响

Effect of La addition on as-cast microstructure and hardness ofFeMnCrNiCo high entropy alloy

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