间隙原子对高熵合金组织及性能影响的研究现状

高熵合金作为一种新型的合金体系，虽然其组成元素复杂，但能形成简单的固溶体，具有许多异于传统合金的结构和性能特征，其研究近年来成为热点。间隙原子可以溶入基体晶格间隙产生固溶强化，与合金元素结合形成细小弥散强化相，以及降低层错能，改变位错运动方式等，从而改善高熵合金性能。文章在论述高熵合金组织结构特性的基础上，分析了间隙原子C、N、O、B对高熵合金相形成规律、强化机理、塑性变形机制的影响，总结了间隙原子含量及其产生的固溶强化、晶粒细化、第二相强化作用对高熵合金组织性能等方面影响的研究进展，最后提出了含间隙原子的高强高韧高熵合金组织结构设计研究的新方向。 

Research progress of effect of interstitial atoms on high-entropy alloy's microstructure and properties

As a new type of alloy system, high entropy alloy, due to its structural and performance characteristics different from traditional alloys, is capable of forming simple solid solution. Thus, its research has become a hot spot in recent years. Gap atoms can dissolve into the matrix lattice gap to produce solid solution strengthening, by combining with alloy elements to form fine dispersion strengthening phase and reducing stacking fault energy and changing dislocation motion mode, which greatly improves the properties of high entropy alloy. This paper analyzes the effects of interstitial atoms C, N, O and B on the formation law, strengthening mechanism and plastic deformation mechanism of high-entropy alloys on the basis of discussing the microstructure characteristics of high-entropy alloys. The research progress of interstitial atoms content and its effects on the microstructure and properties of high-entropy alloys, such as solution strengthening, grain refinement and second-phase strengthening, are summarized. In addition, we put forward a new research direction of microstructure design of high-strength high-toughness high-entropy alloys containing interstitial atoms.