材料科学
共晶体系
微观结构
合金
极限抗拉强度
冶金
层状结构
延伸率
高熵合金
铸造
作者
Xiaobo Zhang,Bo Li,Long Zeng,Jiaojiao Yi,Binqiang Wang,Conghui Hu,Mingxu Xia
出处
期刊:Intermetallics
[Elsevier]
日期:2023-03-01
卷期号:154: 107808-107808
被引量:8
标识
DOI:10.1016/j.intermet.2022.107808
摘要
Alloying is an important and effectivise means to realize mechanical properties improvement of alloys and HEAs. In this article, series of (AlCoCrFeNi2.1)100-xRex high entropy alloys, where x = 0, 0.3, 0.6 and 1 (wt.%), were prepared using a centrifugal casting method, and the effect of Re content on the phase composition, microstructure and mechanical properties was investigated. With Re addition increase, the NiAl-enriched phases in the base alloy decreased or even disappeared, and the lamellar spacing of eutectic phases decreased. Moreover, FeCoCr-enriched primary dendrite phases emerged in the alloy system after Re addition and its volume increased dramaticly when Re addition increased to 1 wt%. The reason for this phenomenon is that the addition of trace Re element makes the shift of eutectic composition point to hypereutectic composition point. Additionally, both yield stress and ultimate tensile stress were increased with Re addition, but the elongation decreased.
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