| 退火温度对AlCrMnFeNiCu0.8高熵合金组织与耐蚀性能的影响 |
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| 引用本文： | 侯瑾睿,鲁若定,卜少聪,许帅领,傅丽华,田保红.退火温度对AlCrMnFeNiCu0.8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. |
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| 作者姓名： | 侯瑾睿 鲁若定 卜少聪 许帅领 傅丽华 田保红 |
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| 作者单位： | 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 |
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| 基金项目： | 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) |
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| 摘 要： | 采用真空电弧熔炼法制备了AlCrMnFeNiCu0.8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。
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| 关 键 词： | 高熵合金 微观组织 耐蚀性能 电化学 |
| 收稿时间： | 2022-04-11 |
Effect of annealing temperature on microstructure and corrosion resistance of AlCrMnFeNiCu0.8 high-entropy alloy |
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| Hou Jinrui,Lu Ruoding,Bu Shaocong,Xu Shuailing,Fu Lihua,Tian Baohong.Effect of annealing temperature on microstructure and corrosion resistance of AlCrMnFeNiCu0.8 high-entropy alloy[J].Heat Treatment of Metals,2022,47(7):52-57. |
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| Authors: | Hou Jinrui Lu Ruoding Bu Shaocong Xu Shuailing Fu Lihua Tian Baohong |
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| Affiliation: | 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 |
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| Abstract: | AlCrMnFeNiCu0.8 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. |
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| Keywords: | high-entropy alloy microstructure corrosion resistance electrochemistry |
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