High Entropy Alloy Having Composite Microstructure and Method of Manufacturing the Same

Abstract

A method of making a metallic alloy, more particularly, a high-entropy alloy with a composite structure that exhibits high strength and good ductility, and is used as a component material in electromagnetic, chemical, shipbuilding, machinery, and other applications, and in extreme environments, and the like.

What is claimed is: 
     
         1 . A method of manufacturing a high-entropy alloy having a composite structure, comprising:
 preparing metallic elements comprising, by weight %, Fe greater than 5% to 35% or less, Mn greater than 5% to 35% or less, Ni greater than 5% to 35% or less, and Co greater than 5% to 35% or less, and comprising at least one of Cu greater than 3% to 40% or less and Ag greater than 3% to 40% or less;   manufacturing an alloy by melting the metallic elements having been prepared in one of casting, arc melting, and powder metallurgy methods;   homogenization heat treating the alloy having been manufactured; and   cooling the alloy after the homogenization heat treating.   
     
     
         2 . The method of manufacturing a high-entropy alloy having a composite structure of  claim 1 , wherein the homogenization heat treating is performed while the alloy is maintained in a temperature range of 900° C. to 1200° C. for 1 hour to 48 hours. 
     
     
         3 . The method of manufacturing a high-entropy alloy having a filamentary composite structure of  claim 1 , further comprising:
 performing deformation processing,   wherein the deformation processing includes hot working, rolling, drawing, at room temperature and elevated temperatures.