Effects of trace element C on microstructure and properties of AlCrCuFeMn high-entropy alloy

被引：0

作者：

Feng L. ^{[1
,2
]}

Wang N. ^{[1
]}

Li Q.-D. ^{[3
]}

Yuan Y.-D. ^{[1
]}

Ma K. ^{[1
]}

Zhao Y.-C. ^{[1
]}

机构：

[1] School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou

[2] State Key Laboratory of Advanced Processing, Reuse of Nonferrous Metals, Lanzhou

[3] CNNC Nuclear Power Operation and Management Co., Ltd., Haiyan

来源：

Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals | 2023年 / 33卷 / 11期

基金：

中国博士后科学基金;

关键词：

carbide; high-entropy alloy; mechanical property; microstructure; wear resistance;

D O I：

10.11817/j.ysxb.1004.0609.2023-44007

中图分类号：

学科分类号：

摘要：

In this paper, AlCrCuFeMnCx(x=0, 0.025, 0.05, 0.075, 0.1, 0.125) high-entropy alloys were prepared using the vacuum arc melting technology. The microstructure and mechanical properties of AlCrCuFeMnCx were analyzed and tested by XRD, SEM, TEM and electronic universal testing machine. The results show that when the carbon content x<0.075, the alloys have a typical dendrite structure. In which the dendrite is BCC structure and the intergranular organization is FCC structure. When the carbon content x≥0.075, the M7C3 phase forms in the alloys, mainly distributed in the dendrite organization. The lattice constant of the BCC phase increases with the increase of carbon content and then decreases, reaching a maximum value of 2.9062 nm at x=0.075. With the increase of carbon content, the hardness and strength of the alloy are improved, while the plasticity is reduced. The AlCrCuFeMnC0.125 alloy has the best comprehensive mechanical properties with a hardness of 470 HV, a wear rate of 1.01×10-5 mm3/(N∙mm), as well as yield strength, compressive strength and deformation rate of 1180 MPa, 1480 MPa, and 15.4%, respectively. © 2023 Central South University of Technology. All rights reserved.

引用

页码：3767 / 3777

页数：10

共 39 条

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