ハイエントロピー合金の原子構造と力学特性―短距離秩序に注目して

In recent years, a new class of alloys called high-entropy alloys（HEAs）have attracted significant attention of a tremendous number of materials scientists in the world due to their excellent combination of high strength and high ductility. Research on HEAs has thus become one of the most active areas in materials science today. There is a renewed interest in atomic structures of solid-solution alloys, as a possibility is proposed to further increase the strength by forming short-range ordering（SRO）only through simple heat-treatment. A review is made on how to detect SRO in the CrCoNi HEA, one of the strongest HEAs, and the effects of SRO on the strength.