Additive manufacturing of high-entropy alloys by thermophysical calculations and in situ alloying

作     者：Mehmet Cagirici Pan Wang Fern Lan Ng Mui Ling Sharon Nai Jun Ding Jun Wei Mehmet Cagirici;Pan Wang;Fern Lan Ng;Mui Ling Sharon Nai;Jun Ding;Jun Wei

作者机构：Singapore Institute of Manufacturing Technology73 Nanyang Drive637662Singapore Department of Materials Science and EngineeringNational University of Singapore117576Singapore 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2021年第94卷第35期

页      面：53-66页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：financially supported by the A^(*)STAR Additive Manufacturing Centre(AMC)Initiative:Work Package 1(High Temperature Materials Development for 3D Additive Manufacturing Grant No.1426800088) 

主　　题：3D printing Cost reduction Electron beam melting High entropy alloy Mechanical properties Phase prediction 

摘      要：Electron beam melting(EBM)is a promising technology to manufacture various alloys with outstanding properties;however,the number of available alloys is *** propose in situ alloying to accelerate the development of advanced and novel alloys,based on thermophysical calculations and CALPHAD approach,during the EBM *** demonstrate our concept through the design and fabrication of high entropy alloys(HEAs).Three CoCrFeNiMn-xTi(x=0.18,0.50,2.00,in molar%)HEAs are ***-built HEAs achieve a homogeneous distribution of elements while forming multiphase alloys resulted from the hot powder *** topological structures formed by secondary phases contribute to an increase in the hardness of EBM-built HEAs up to 900 *** alloy design,a systematic analysis on Co Cr Fe Ni Mn-0.18 Ti HEA elucidates the microstructural evolution in *** findings provide a deep understanding of in situ alloying and pave the way to develop new alloys specific to the EBM process.