多主元合金中局部化学短程有序的研究进展

多主元合金因其独特的微观结构和优异的综合性能而展现出了广阔的应用前景，也是近年来金属结构材料领域的研究热点之一。作为一类新型复杂合金，多主元合金与传统合金在原子尺度上存在本质的区别，其中局部化学短程有序作为多主元合金中一种特殊的原子级微观组织，其与位错的交互作用将对合金的变形行为及力学性能产生重要的影响。本文综述了多主元复杂合金中局部化学短程有序的相关研究进展，主要包括化学短程有序的形成因素、表征方法以及对位错行为和力学性能的影响，并针对目前关于化学短程有序的定量表征、调控技术、理论模型建立及对服役性能的影响等方面存在的问题与不足进行了分析和展望。

Progress in the Local Chemical Short-Range Order of Multi-Principal Alloys

Multi-principal alloys have exhibited broad structural applications due to their unique microstructure and excellent comprehensive properties, and also been the research focus of structural metallic materials in recent years. As a new type of complex concentrated alloys, there are essential differences between multi-principal alloys and traditional alloys in atomic structure, in which the local chemical short-range order (CSRO) is one special atomic microstructure. The interactions between CSRO and moving dislocations can make a significant influence on the deformation behavior and mechanical properties of multi-principal alloys. Therefore, this paper mainly summarized the progress in the local chemical order in multi-principal alloys, including the formation factors, characterization methods, and effects on deformation behavior and mechanical properties. Moreover, the existing problems and shortcomings in the directly quantitative characterization, quantitative manipulation, theoretical model development and the influence on service performance of chemical short-range order in current research were analyzed and prospected.