A novel bulk eutectic high-entropy alloy with outstanding as-cast specific yield strengths at elevated temperatures
A novel bulk eutectic high-entropy alloy with outstanding as-cast specific yield strengths at elevated temperatures
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DOI：
10.1016/j.scriptamat.2021.114132
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发表时间：
2021-11
影响因子：
6
通讯作者：
Mingliang Wang;Yiping Lu;Tongmin Wang;Chuan Zhang;Z. Cao;Tingju Li;P. Liaw
中科院分区：
文献类型：
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作者：
Mingliang Wang;Yiping Lu;Tongmin Wang;Chuan Zhang;Z. Cao;Tingju Li;P. Liaw
共晶高熵合金由于其优异的性能和巨大的工业应用潜力，近年来一直是研究的热点。本研究报告了一种新型的AlCr1.3TiNi2EHEA，具有低密度和优异的高温力学性能。采用直接凝固法首次制备了具有均匀超细L21和BCC层片结构（层间距~ 400 nm）的公斤级EHEA铸锭。铸态AlCr1.3TiNi2EHEA的室温和高温硬度以及比屈服强度值比大多数报道的耐火高熵合金（RHEA）、EHEA以及传统的Ni基和Ti基合金高得多。
Due to their excellent properties and great potential for industrial application, eutectic high-entropy alloys (EHEAs) have been a hot topic of study over the past few years. The current study reports a novel AlCr1.3TiNi2EHEA with a low density and outstanding mechanical properties at elevated temperatures. A kilogram-scale EHEA ingot with uniform and ultrafine L21and BCC lamellar structures (interlamellar spacing ~ 400 nm) was firstly prepared by a direct solidification method. The as-cast AlCr1.3TiNi2EHEA exhibits much higher room- and high-temperature hardness and specific yield strength values than most reported refractory high-entropy alloys (RHEAs), EHEAs, and conventional Ni- and Ti-based alloys.