FeCrMnAlxCu(2－x)高熵合金的组织与性能

兰州理工大学学报 ›› 2024, Vol. 50 ›› Issue (4): 6-11.

FeCrMnAl_xCu_(2－x)高熵合金的组织与性能

李大鹏^*1, 邓国辉¹, 吴志国¹, 宣蕊²

1.一汽-大众汽车有限公司技术开发部, 吉林长春 130010;
2.上海格麟倍科技发展有限公司, 上海 201100

收稿日期:2023-11-13 出版日期:2024-08-28 发布日期:2024-08-30
通讯作者: 李大鹏(1981-),男,吉林长春人,高级工程师.Email:depeng.Li@faw-vw.com

Microstructure and properties of FeCrMnAl_xCu_(2－x) high-entropy alloys

LI Da-peng¹, DENG Guo-hui¹, WU Zhi-guo¹, XUAN Rui²

1. Technical Development Department of FAW-Volkswagen Automotive Co. Ltd, Jilin 130010, China;
2.Gelinbei Science and Technology Development Co. Ltd., Shanghai 201100, China

Received:2023-11-13 Online:2024-08-28 Published:2024-08-30

摘要/Abstract

摘要： 采用真空电弧熔炼技术制备了FeCrMnAl_xCu_(2－x)(x=1.3, 1.4, 1.5, 1.6, 1.7)高熵合金,研究了Al、Cu含量对FeCrMnAl_xCu_(2－x)高熵合金组织结构、力学性能和摩擦学性能的影响.结果表明:FeCrMnAl_xCu_(2－x)高熵合金为BCC结构单相固溶体.组织均由树枝晶组成,随x的增加,屈服强度逐渐上升,在x=1.5时,达到最大值1 092.31 MPa.抗压强度和变形率均随x的增加呈下降趋势,且在x=1.3时达到最大值,分别为1 517.84 MPa和43.36%.FeCrMnAl_1.7Cu_0.3高熵合金显微硬度达到最大值559.9 HV.磨损率最小为4.70×10^－6 mm³ N^－1 m^－1.随x的增大,合金磨损机制主要以磨粒磨损、粘着磨损、氧化磨损为主.

关键词: 真空电弧熔炼, 高熵合金, 微观组织, 机械性能

Abstract: FeCrMnAl_xCu_(2－x)(x=1.3, 1.4, 1.5, 1.6, 1.7) high-entropy alloys (HEAs) was prepared by vacuum arc melting technology, and the influence of Al and Cuon the microstructure, mechanical properties, and tribological behavior of FeCrMnAl_xCu_(2－x) HEAs was investigated. The results revealed that FeCrMnAl_xCu_(2－x) HEAs is BCC solid solution structure. The microstructure of the alloys consist of dendritic structure. With increasing x, the yield strength gradually increase and reach a maximum value of 1 092.31 MPa at x=1.5. Both compressive strength and deformation rate exhibit a decreasing trend with increasing x, reaching their maximum values at x=1.3, which are 1 517.84 MPa and 43.36%, respectively. The FeCrMnAl_1.7Cu_0.3HEA exhibit a maximum microhardness of 559.9 HV. The minimum wear rate is found to be 4.70×10^－6mm³·N^－1·m^－1. As x increased, the dominant wear mechanisms in the alloy are primarily abrasive wear, adhesive wear, and oxidative wear.

Key words: vacuum arc melting, high-entropy alloys, microstructure, mechanical properties

中图分类号:

TG146

李大鹏, 邓国辉, 吴志国, 宣蕊. FeCrMnAl_xCu_(2－x)高熵合金的组织与性能[J]. 兰州理工大学学报, 2024, 50(4): 6-11.

LI Da-peng, DENG Guo-hui, WU Zhi-guo, XUAN Rui. Microstructure and properties of FeCrMnAl_xCu_(2－x) high-entropy alloys[J]. Journal of Lanzhou University of Technology, 2024, 50(4): 6-11.

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