高强韧共晶高熵合金的研究进展  

Research progress of high strength and toughness eutectic high entropy alloys

作　　者：杨恬 许军锋[1] 李卓[1] Yang Tian;Xu Junfeng;Li Zhuo(The Shaanxi Key Laboratory of Photoelectric Functional Materials and Devices,Xi'an Technological University,Xi'an Shaanxi 710021,China)

机构地区：[1]西安工业大学陕西省光电功能材料与器件重点实验室,陕西西安710021

出　　处：《金属热处理》2021年第2期1-7,共7页Heat Treatment of Metals

基　　金：国家自然科学基金(51971166);陕西省教育厅重点实验室项目(18JS050);陕西省科技新星项目(2016KJXX-87)。

摘　　要：共晶高熵合金具有高硬度、高耐腐蚀性、高耐磨性、极好的铸造性、优异的抗氧化性和磁性等诸多传统合金无法比拟的特点,是传统物理冶金领域对合金设计的一次突破,为新材料、新性能的探索开辟了新的平台。虽然目前已出现多种类型的共晶高熵合金,但对共晶高熵合金的性能和设计思路还缺乏宏观的认识。本文将综述近年来共晶高熵合金的设计方法:试验法、代换法、伪二元法和计算相图法,对比分析每种方法的优缺点,进一步分析共晶高熵合金的结构特征和热机械处理对其组织和力学性能的综合影响,总结共晶高熵合金设计可能出现的问题,并展望其未来的研究方向。Eutectic high entropy alloys possess many excellent characteristics that traditional alloys cannot compare,such as high hardness,high corrosion resistance,high wear resistance,excellent casting property,excellent oxidation resistance and magnetic properties,so it is a breakthrough of alloy design in the field of traditional physical metallurgy,and it opens up a new platform for the exploration of new materials and new properties.Currently,many eutectic high entropy alloys with unique properties have been designed,however,the properties and design ideas of eutectic high entropy alloys are still lacking in macroscopic understanding.In this review article,the design methods of eutectic high entropy alloys(including the experimental method,the substitution method,the pseudo-binary method,and the CALPHAD method)were reviewed,the advantages and weaknesses of each method were further compared and analyzed.Subsequently,comprehensive effects of structural characteristics and thermo-mechanical processing on microstructure and mechanical properties of the eutectic high entropy alloys were analyzed.The possible problems in the design process of eutectic high entropy alloys were summarized and the future research direction was prospected.

关 键 词：共晶高熵合金 设计方法 结构特征 热机械处理 

分 类 号：TG139[一般工业技术—材料科学与工程]