Effects of rare earth elements on AlCoCrFeNi2.1 eutectic high-entropy alloy

被引：4
|
作者：
Gu, Ze-Hao [1 ]
Nong, Zhi-Sheng [1 ]
Su, Kan [1 ]
Wang, Ji-Jie [1 ]
Zhu, Jing-Chuan [2 ]
机构：
[1] Shenyang Aerosp Univ, Sch Mat Sci & Engn, Shenyang 110136, Liaoning, Peoples R China
[2] Harbin Inst Technol, Sch Mat Sci & Engn, Harbin, Peoples R China
来源：
MATERIALS SCIENCE AND TECHNOLOGY | 2023年 / 39卷 / 16期
基金：
中国国家自然科学基金;
关键词：
Eutectic high-entropy alloy; rare earth element; microstructures; mechanical properties; element distribution; SOLID-SOLUTION; MECHANICAL-PROPERTIES; THERMAL-EXPANSION;
D O I：
10.1080/02670836.2023.2196473
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In order to explore the effect of rare earth elements (REEs) on the eutectic high-entropy alloys (EHEAs), 0.2 atomic per cent of Sc, Y, and La elements were added to the AlCoCrFeNi2.1(REE0) EHEA in this work. The phase composition, element distribution, electrochemical properties and mechanical properties of the alloys were analysed. The results showed that the AlCoCrFeNi2.1-based HEAs are still composed of Co, Cr, Fe (face-centred cubic)-rich phase and Al, Ni (face-centred cubic)-rich phase. After Sc, Y, La were added, Ni2Sc, Al2Y, Al2La and other intermetallics were formed in the AlCoCrFeNi2.1 alloy. In addition, it was proved that Y element can promote the formation of hexagonal close-packed (HCP) phase. AlCoCrFeNi2.1Y0.2(Y0.2) alloy has excellent corrosion resistance. AlCoCrFeNi2.1Sc0.2(Sc0.2) alloy has the best mechanical properties.
引用
收藏
页码：2230 / 2239
页数：10
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