CoCrFeNi-M系高熵合金的结构与相变

Structure and Phase Transition in CoCrFeNi-M High-entropy Alloys Systems

高熵合金作为金属材料领域近年来的三大突破之一,其开拓性地打破了传统合金设计理念的思想囚笼,适当配比的高熵合金可制得具有高强度、高耐磨性及耐蚀性等优异性能的合金材料。Fe、Co、Cr、Ni四种元素在高熵合金体系中研究得最为广泛,并得到一定的研究成果。从CoCrFeNi-M系高熵合金的结构与相变特点切入,介绍了高熵合金的结构分类特点,分析了高熵合金相形成及其规律,阐述了合金元素对铸态高熵合金相结构的影响,探讨了高熵合金的热处理过程。最后,总结了高熵合金的研究现状及其存在的问题。

High-entropy alloys,one of the three breakthroughs of metallic materials field in recent years,dash out the cage of traditional design concept about alloys,and could produce alloy materials with high strength,excellent wear resistance and anti-corrosion in proper proportion.The four elements of Fe,Co,Cr,Ni have been widely applied in the high-entropy alloys systems and gained a number of outstanding achievements.This paper demonstrate the feature of structures and transitions in CoCrFeNi-M high-entropy alloy systems.Furthermore,the effect of alloying elements on as-cast high-entropy alloys are illustrated,the heat treatment processes of high-entropy alloys are discussed.Finally,the current research status and existing problems of high entropy alloys are summarized.