AlCoCrFeMnZr近共晶高熵合金的组织形貌及耐磨性

doi:10.13251/j.issn.0254-6051.2023.01.001

金属热处理 ›› 2023, Vol. 48 ›› Issue (1): 1-5.DOI: 10.13251/j.issn.0254-6051.2023.01.001

• 组织与性能 • 下一篇

AlCoCrFeMnZr近共晶高熵合金的组织形貌及耐磨性

王志新, 杨成, 马明星, 王博臻, 董晨, 李尚之, 侯润森

中原工学院材料与化工学院, 河南郑州 450007

收稿日期:2022-08-17 修回日期:2022-10-31 出版日期:2023-01-25 发布日期:2023-02-03
通讯作者: 马明星,副教授,博士,E-mail:manager92@163.com
作者简介:王志新(1972—),男,教授,博士,主要研究方向为材料加工及制备,E-mail:zxwang72@163.com。
基金资助:
国家自然科学基金(51271115);河南省重点科技攻关项目(142102210084);河南省高等学校重点科研项目(20B430022);中国纺织工业联合会科技指导性项目(2020029);河南省高校省级大学生创新创业训练计划(S202010465030,S202110465012)

Microstructure and wear resistance of AlCoCrFeMnZr near-eutectic high-entropy alloy

Wang Zhixin, Yang Cheng, Ma Mingxing, Wang Bozhen, Dong Chen, Li Shangzhi, Hou Runsen

School of Materials and Chemical Engineering, Zhongyuan University of Technology, Zhengzhou Henan 450007, China

Received:2022-08-17 Revised:2022-10-31 Online:2023-01-25 Published:2023-02-03

摘要/Abstract

摘要： 采用真空熔炼法制备出了AlCoCrFeMnZr近共晶高熵合金,通过XRD、SEM、显微硬度计和摩擦磨损试验机测试了AlCoCrFeMnZr合金的晶体结构、组织形貌、硬度以及耐磨性能。结果表明,AlCoCrFeMnZr合金的物相结构为BCC和HCP双相结构,组织由初生相和细密的片状共晶组织组成。初生相由富Cr、Fe、Zr的HCP相组成,以树枝晶方式生长,片状共晶组织中枝晶区域(α相)主要分布Co、Cr、Fe,晶间(β相)主要分布Al和Zr,符合高熵合金组织及元素分布规律。磨损方式由粘着磨损和磨粒磨损转变为氧化磨损,摩擦因数出现先增加后减少的趋势,平均摩擦因数为0.5432,显微硬度为768.8 HV0.5,具有优良的硬度和耐磨性。

关键词: 高熵合金, 共晶结构, 结构, 耐磨性

Abstract: AlCoCrFeMnZr near-eutectic high-entropy alloy was prepared by vacuum melting, then its crystal structure, morphology, hardness and wear resistance were tested by means of XRD, SEM, microhardness tester and friction and wear testing machine. The results show that the phase structure of the AlCoCrFeMnZr alloy is BCC+HCP dual-phase structure, composing of primary phase and fine lamellar eutectic. The primary phase consists of the HCP phase enriched in Cr, Fe, and Zr, which grows in a dendritic manner. The main elements in the dendrite region (α phase) of the lamellar eutectic structure are Co, Cr and Fe, and the main elements in the intergranular (β phase) are Al and Zr, which conforms to the structure and element distribution of high-entropy alloys. The wear model changes from adhesive wear and abrasive wear to oxidative wear, and the friction factor shows a trend of increasing first and then decreasing, and the average friction factor is 0.5432, the microhardness is 768.8 HV0.5, that means the alloy has excellent hardness and wear resistance.

Key words: high entropy alloy, eutectic structure, structure, wear resistance

中图分类号:

TG113.1

王志新, 杨成, 马明星, 王博臻, 董晨, 李尚之, 侯润森. AlCoCrFeMnZr近共晶高熵合金的组织形貌及耐磨性[J]. 金属热处理, 2023, 48(1): 1-5.

Wang Zhixin, Yang Cheng, Ma Mingxing, Wang Bozhen, Dong Chen, Li Shangzhi, Hou Runsen. Microstructure and wear resistance of AlCoCrFeMnZr near-eutectic high-entropy alloy[J]. Heat Treatment of Metals, 2023, 48(1): 1-5.

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AlCoCrFeMnZr近共晶高熵合金的组织形貌及耐磨性

Microstructure and wear resistance of AlCoCrFeMnZr near-eutectic high-entropy alloy

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