Effect of Heat Treatment on Microstructure and Mechanical Properties of Direct Energy Deposited AlCoCrFeNi2.1

An, Jiatuo1; Zhou, Yang1; Yan, Ming2; Liu, Zhaoyang1,3; Zhu, Qiang1

2022-04-01

10.1007/s11666-022-01390-4

JOURNAL OF THERMAL SPRAY TECHNOLOGY   影响因子和分区

1059-9630

1544-1016

In this study, a thin-wall build of AlCoCrFeNi2.1 eutectic high-entropy alloy (EHEA) was additively manufactured by multilayer direct energy deposition process. The effect of heat treatment on the microstructure, phase transformation and mechanical properties was analyzed. The microstructure near the substrate shows a feature of coarse columnar dendritic FCC phases and tiny lamellar eutectic structure distributing in the interdendritic region, while, near the middle region of thin-wall build, the microstructure consists of lamellar eutectic structure. The subsequent heat treatment has a significant effect on the microstructure evolution and mechanical properties. Plenty of short bulk FCC phases emerge during the heat treatment process. When the heat treatment temperature (HTT) reaches 1100 degrees C, the short bulk FCC phase transforms into BCC phase. The eutectic structure firstly refines and then coarsens with the increase in HTT from 800 to 1300 degrees C. The tensile strength obtains a maximum value when HTT = 1100 degrees C at which the eutectic structure has the finest average width. Our results supported some help to understand the microstructure diversity, as well as the effect of heat treatment, in the laser additive manufactured AlCoCrFeNi2.1 EHEA.

direct energy deposition eutectic high-entropy alloy heat treatment microstructure

SCI ; EI

英语

第一 ; 通讯

National Natural Science Foundation of China[51905253,91860131] ; Science and Technology Innovation Commission of Shenzhen["JCYJ20190809152401680","JCYJ20180504165824643"] ; Natural Science Foundation of Guangdong Province of China[2018A030310132]

Materials Science

Materials Science, Coatings & Films

WOS:000781743400007

SPRINGER

MATERIALS SCIENCE

Web of Science

1.Southern Univ Sci & Technol, Dept Mech & Energy Engn, Shenzhen Key Lab Addit Mfg High Performance Mat, Shenzhen 518055, Peoples R China
2.Southern Univ Sci & Technol, Mat Sci & Engn, Shenzhen 518055, Peoples R China
3.Guangzhou Univ, Sch Mech & Elect Engn, Guangzhou 510006, Peoples R China

An, Jiatuo,Zhou, Yang,Yan, Ming,et al. Effect of Heat Treatment on Microstructure and Mechanical Properties of Direct Energy Deposited AlCoCrFeNi2.1[J]. JOURNAL OF THERMAL SPRAY TECHNOLOGY,2022.

An, Jiatuo,Zhou, Yang,Yan, Ming,Liu, Zhaoyang,&Zhu, Qiang.(2022).Effect of Heat Treatment on Microstructure and Mechanical Properties of Direct Energy Deposited AlCoCrFeNi2.1.JOURNAL OF THERMAL SPRAY TECHNOLOGY.

An, Jiatuo,et al."Effect of Heat Treatment on Microstructure and Mechanical Properties of Direct Energy Deposited AlCoCrFeNi2.1".JOURNAL OF THERMAL SPRAY TECHNOLOGY (2022).