Microstructure and Mechanical Properties of TiC-Reinforced Al–Mg–Sc–Zr Composites Additively Manufactured by Laser Direct Energy Deposition

作     者：Rong Xu Ruidi Li Tiechui Yuan Hongbin Zhu Ping Li Rong Xu;Ruidi Li;Tiechui Yuan;Hongbin Zhu;Ping Li

作者机构：State Key Laboratory of Powder MetallurgyCentral South UniversityChangsha 410083.China CRRC Industrial Academy Co.LtdBeijing 100070China 

出 版 物：《Acta Metallurgica Sinica(English Letters)》 (金属学报（英文版）)

年 卷 期：2022年第35卷第3期

页      面：411-424页

核心收录：

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

基　　金：the National Natural Science Foundation of China(No.51871249) the Science Foundation of Shangdong Province(ZR2020ZD04) the Science and Technology Plan Project of Shenzhen(JCYJ20180508151903646) the Hunan distinguished author(2020JJ2046) the Hunan key R&D Plan(2020WK2027) the Large-scale Instruments and Equipments of Central South University(CSUZC202110) the Science and Technology Planning Project of Guangxi(Guike AB 19050002) 

主　　题：Laser additive manufacturing Aluminum matrix composites Mechanical property Microstructure 

摘      要：In order to refine the microstructure and improve the performance of direct energy deposited(DED)additively manufactured Al–Mg–Sc–Zr alloy,TiC-modified Al–Mg–Sc–Zr composites were prepared by DED and the effect of TiC content on the microstructure and performance was *** the absence of TiC particle,the microstructure of Al–Mg–Sc–Zr alloy prepared by DED consisted of fine grains with average size of 8.36μm,and well-dispersed nano-Al;(Sc,Zr)particles inside the grains and Mg;Si phase along the grain *** the addition of 1 wt%TiC,the microstructure of TiC/Al–Mg–Sc–Zr prepared by DED became finer apparently compared with that without TiC;while the further increase of TiC content to 3 wt%,the microstructure of TiC/Al–Mg–Sc–Zr prepared by DED became coarser with appearance of a new kind of needle-like(Ti,Zr);Si;***,the addition of TiC decreased the porosity of Al–Mg–Sc–Zr prepared by ***,after the addition of TiC,the tensile strength increased from 283.25 MPa to 344.98–361.51 MPa,and the elongation increased from 3.61%to 9.58–14.10%.The potential mechanism of the microstructure evolution and strength improvement was *** research will provide new insights into the available metal matrix composites by laser additive manufacturing(LAM).