Method for predicting single phase formation of multi-component high entropy alloys

摘要

The present invention relates to a method for evaluating single-phase forming ability through characteristic temperature relationship of high entropy alloys, and more specifically, to a method for evaluating single-phase forming ability of multi-component high entropy alloys by considering whether high entropy alloys are precipitated at low temperatures through a relational expression considering not only a thermodynamic point of view of a phase change but also a dynamic point of view thereof. Particularly, it is possible to predict if a single-phase can be formed when related alloys are cooled to 1 K / min or more after homogenization heat treatment if a value is less than or equal to 0.65. Also, according to the present invention, it is possible to predict the single-phase forming ability of the high entropy alloys more precisely by taking into consideration dynamic factors as well as thermodynamic factors for suppressing precipitation at low temperatures by using correlation between characteristic temperatures. Accordingly, by providing effective guidelines for development of single-phase high entropy alloys and related composites with unique properties, it is possible to minimize temporal and economic costs of development of related new alloys.