共晶高熵合金研究进展

Research Progress of Eutectic High-entropy Alloys

共晶高熵合金是凝固过程中发生共晶转变的多组元合金,具有优异的液态充型能力和机械性能,适用于生产形状复杂、对力学性能要求较高且不能进行热机械处理的零件。共晶高熵合金具有4种及以上元素,且相组成和组织形貌对合金成分变化不敏感,因此具有很大的性能调控空间及工艺窗口。通过调控共晶高熵合金的相组成及组织形貌可使其叠加各种优异性能。本文从设计方法、制备工艺、组织结构、力学及理化性能等方面综述了共晶高熵合金的研究现状,并对共晶高熵合金未来的发展进行展望。

Eutectic high-entropy alloys are multi-component alloys that undergo eutectic transformation during solidification.It has excellent liquid filling ability and mechanical properties and is suitable for the production of parts with complex shapes and high mechanical properties that cannot be processed by thermomechanical processing.An eutectic high-entropy alloy has at least four elements,and the phase component and microstructure are not sensitive to changes in the alloy composition,leading to a large space for performance control and process windows.Various excellent properties can be superimposed by adjusting the phase component and eutectic microstructure.In this paper,the research status of eutectic high-entropy alloys is reviewed from the perspectives of the design method,preparation technology,microstructure,mechanics and physical and chemical properties.The future development of eutectic high-entropy alloys is proposed.