硅对铸态CoCrFeMnNi高熵合金组织及性能的影响

doi:10.13251/j.issn.0254-6051.2024.02.007

金属热处理 ›› 2024, Vol. 49 ›› Issue (2): 45-52.DOI: 10.13251/j.issn.0254-6051.2024.02.007

硅对铸态CoCrFeMnNi高熵合金组织及性能的影响

李荣斌^1,2, 宗在康¹, 张志玺², 张如林²

1.上海理工大学材料与化学学院, 上海 200093;
2.上海电机学院材料学院, 上海 201306

收稿日期:2023-08-07 修回日期:2023-12-25 出版日期:2024-03-27 发布日期:2024-03-27
作者简介:李荣斌(1969—),男,教授,博士,主要研究方向为高温合金结构与性能,E-mail:lirb@sdju.edu.cn
基金资助:
国家自然科学基金联合基金(U23A20607);上海大件热制造工程技术研究(18DZ2253400)

Effect of Si addition on microstructure and properties of as-cast CoCrFeMnNi high entropy alloy

Li Rongbin^1,2, Zong Zaikang¹, Zhang Zhixi², Zhang Rulin²

1. School of Materials and Chemistry, University of Shanghai for Science and Technology, Shanghai 200093, China;
2. School of Materials Engineering, Shanghai Dianji University, Shanghai 201306, China

Received:2023-08-07 Revised:2023-12-25 Online:2024-03-27 Published:2024-03-27

摘要/Abstract

摘要： 采用冷坩埚悬浮熔炼法制备了CoCrFeMnNiSi_x(x=0,0.3,0.6,0.9)系列高熵合金。使用X射线衍射仪、扫描电镜及附带的能谱仪分析了硅添加后合金组织结构的变化,并对CoCrFeMnNiSi_x合金硬度、室温摩擦磨损及室温压缩性能进行了一系列测试。结果表明,CoCrFeMnNi合金为单相FCC结构,随着硅含量的增加,FCC基相晶界处Mn、Ni、Si元素富集并且逐渐析出硅化物,产生细晶强化及弥散强化,从而使合金的硬度、耐磨性、压缩强度和压缩屈服强度得到提升,其中,CoCrFeMnNiSi_0.9合金综合性能最佳。

关键词: 高熵合金, 硅添加, 显微组织, 晶粒细化, 力学性能

Abstract: CoCrFeMnNiSi_x(x=0,0.3, 0.6, 0.9) high entropy alloys were fabricated by cold crucible levitation melting. The changes of the microstructure of the alloy after the addition of silicon were analyzed by means of X-ray diffraction, scanning electron microscope and the attached energy spectrometer. A series of tests on the hardness, room temperature friction and wear and room temperature compression properties of CoCrFeMnNiSi_x alloy were carried out. The results show that CoCrFeMnNi alloy is a single-phase FCC structure. With the increase of silicon content, Mn, Ni and Si elements are enriched at the grain boundary of the FCC base phase, and silicide are gradually precipitated, finally resulting in fine grain strengthening and dispersion strengthening, which improves the hardness, wear resistance, compressive strength and yield strength of the alloy. Among them, CoCrFeMnNiSi_0.9 has the best comprehensive performance.

Key words: high entropy alloy, silicon addition, microstructure, grain refinement, mechanical properties

中图分类号:

TG146.1

李荣斌, 宗在康, 张志玺, 张如林. 硅对铸态CoCrFeMnNi高熵合金组织及性能的影响[J]. 金属热处理, 2024, 49(2): 45-52.

Li Rongbin, Zong Zaikang, Zhang Zhixi, Zhang Rulin. Effect of Si addition on microstructure and properties of as-cast CoCrFeMnNi high entropy alloy[J]. Heat Treatment of Metals, 2024, 49(2): 45-52.

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硅对铸态CoCrFeMnNi高熵合金组织及性能的影响

Effect of Si addition on microstructure and properties of as-cast CoCrFeMnNi high entropy alloy

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