退火温度对AlCrMnFeNiCu0.8高熵合金组织与耐蚀性能的影响

doi:10.13251/j.issn.0254-6051.2022.07.009

金属热处理 ›› 2022, Vol. 47 ›› Issue (7): 52-57.DOI: 10.13251/j.issn.0254-6051.2022.07.009

退火温度对AlCrMnFeNiCu_0.8高熵合金组织与耐蚀性能的影响

侯瑾睿¹, 鲁若定¹, 卜少聪¹, 许帅领¹, 傅丽华², 田保红^1,3

1.河南科技大学材料科学与工程学院, 河南洛阳 471023;
2.河南科技大学高端轴承摩擦学技术与应用国家地方联合工程实验室, 河南洛阳 471023;
3.有色金属新材料与先进加工技术省部共建协同创新中心, 河南洛阳 471023

收稿日期:2022-04-11 修回日期:2022-05-30 出版日期:2022-07-25 发布日期:2022-08-12
通讯作者: 傅丽华,讲师,博士,E-mail:flhustb@haust.edu.cn
作者简介:侯瑾睿(2001—),女,主要研究方向为金属材料的热处理工艺,E-mail:2247387814@qq.com。
基金资助:
国家自然科学基金(52101083) ;河南省科技攻关项目(212102210117);大学生创新创业训练计划(202110464006)

Effect of annealing temperature on microstructure and corrosion resistance of AlCrMnFeNiCu_0.8 high-entropy alloy

Hou Jinrui¹, Lu Ruoding¹, Bu Shaocong¹, Xu Shuailing¹, Fu Lihua², Tian Baohong^1,3

1. School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang Henan 471023, China;
2. National United Engineering Laboratory for Advanced Bearing Tribology, Henan University of Science and Technology, Luoyang Henan 471023, China;
3. Provincial and Ministerial Co-construction of Collaborative Innovation Center for Non-ferrous Metal New Materials and Advanced Pressing Technology, Luoyang Henan 471023, China

Received:2022-04-11 Revised:2022-05-30 Online:2022-07-25 Published:2022-08-12

摘要/Abstract

摘要： 采用真空电弧熔炼法制备了AlCrMnFeNiCu_0.8高熵合金,并在200、400、600、800 ℃下进行真空退火处理4 h,利用光学显微镜(OM)、X射线衍射仪(XRD)表征了合金的组织和晶体结构,使用标准三电极系统CHI660D电化学工作站分析了合金的耐蚀性能。结果表明,合金的微观组织表现为富Cu区和贫Cu区,主要由Fe-Cr固溶体、Al-Ni固溶体和富Cu固溶体组成,随着退火温度的升高,BCC结构较强,FCC结构较弱。在400 ℃退火下合金具有最正的自腐蚀电位(-0.584 V)和最低的自腐蚀电流密度(0.6618 μA·cm^-2),在600 ℃和800 ℃退火条件下,阻抗图谱中出现了明显的扩散效应,导致了合金耐蚀性降低。

关键词: 高熵合金, 微观组织, 耐蚀性能, 电化学

Abstract: AlCrMnFeNiCu_0.8 high-entropy alloy was prepared by vacuum arc melting and were treated by vacuum annealing at 200, 400, 600, and 800 ℃ for 4 h. The microstructure and crystal structure of the alloy were characterized by means of optical microscope (OM) and X-ray diffraction (XRD). The corrosion resistance of the alloy was analyzed by means of a standard three-electrode system CHI660D electrochemical workstation. The results show that the microstructure of the alloy is Cu-rich zone and Cu-poor zone, mainly composed of Fe-Cr solid solution, Al-Ni solid solution and Cu-rich solid solution. With the increase of annealing temperature, the BCC structure is stronger and FCC structure is weaker. After anneding at 400 ℃, the alloy has the most positive self-corrosion potential (-0.584 V) and the lowest self-corrosion current density (0.6618 μA·cm^-2). After anneding at 600 ℃ and 800 ℃, the diffusion effect appears in the impedance map, which leads to the decrease of corrosion resistance of the alloy.

Key words: high-entropy alloy, microstructure, corrosion resistance, electrochemistry

中图分类号:

TG166.7

侯瑾睿, 鲁若定, 卜少聪, 许帅领, 傅丽华, 田保红. 退火温度对AlCrMnFeNiCu_0.8高熵合金组织与耐蚀性能的影响[J]. 金属热处理, 2022, 47(7): 52-57.

Hou Jinrui, Lu Ruoding, Bu Shaocong, Xu Shuailing, Fu Lihua, Tian Baohong. Effect of annealing temperature on microstructure and corrosion resistance of AlCrMnFeNiCu_0.8 high-entropy alloy[J]. Heat Treatment of Metals, 2022, 47(7): 52-57.

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退火温度对AlCrMnFeNiCu_0.8高熵合金组织与耐蚀性能的影响

Effect of annealing temperature on microstructure and corrosion resistance of AlCrMnFeNiCu_0.8 high-entropy alloy

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退火温度对AlCrMnFeNiCu0.8高熵合金组织与耐蚀性能的影响

Effect of annealing temperature on microstructure and corrosion resistance of AlCrMnFeNiCu0.8 high-entropy alloy

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退火温度对AlCrMnFeNiCu_0.8高熵合金组织与耐蚀性能的影响

Effect of annealing temperature on microstructure and corrosion resistance of AlCrMnFeNiCu_0.8 high-entropy alloy