文献类型：期刊文献

英文题名：Microstructure and Mechanical Properties of Fiber Laser Welded Joints of CoCrFeNiCu High-Entropy Alloy and 304 Stainless Steel

作者：He, Fu Qin, Qingdong Li, Juan Zhao, Honglong Zhou, Fugui Shen, Xuefeng Wang, Daoyi Jiao, Jianguo

第一作者：He, Fu

机构：[1] College of Materials and Metallurgy, Guizhou University, Guizhou, Guiyang, 550025, China; [2] Key Laboratory of Light Metal Materials Processing Technology of Guizhou Province, Guizhou Institute of Technology, Guiyang, 550003, China; [3] 2011 Special Functional Materials Collaborative Innovation Center of Guizhou Province, Guiyang, 550003, China; [4] Guizhou Hangrui Aviation Precision Parts Manufacturing Co., Ltd, Zunyi, 563000, China

第一机构：College of Materials and Metallurgy, Guizhou University, Guizhou, Guiyang, 550025, China

通信机构：Key Laboratory of Light Metal Materials Processing Technology of Guizhou Province, Guizhou Institute of Technology, Guiyang, 550003, China|贵州理工学院材料与冶金工程学院;贵州理工学院;

年份：2025

卷号：34

期号：12

起止页码：11742-11754

外文期刊名：Journal of Materials Engineering and Performance

收录：EI(收录号：20243216832997);Scopus(收录号：2-s2.0-85200572036)

语种：英文

外文关键词：Austenitic stainless steel - Brittle fracture - Chromium alloys - Cobalt alloys - Copper - Copper alloys - Ductile fracture - Entropy - Fiber lasers - Grain boundaries - Grain refinement - Heat affected zone - High-entropy alloys - Laser beam welding - Nickel steel - Steel fibers - Textures

摘要：To expand the engineering application of high-entropy alloys, the CoCrFeNiCu high-entropy alloy and 304 stainless steel were joined by fiber laser welding, and the microstructure and mechanical properties were investigated. An "hourglass-shaped" welded joint without any visible defects was successfully obtained, and four distinct zones were formed in the welded joint: the fusion zone, partial melting zone, the heat-affected zone and base metal. The fusion zone exhibits a refine equiaxed grains and columnar grains with the same crystalline structure to that of the CoCrFeNiCu high-entropy alloy base metal. The content of Cu element was significant decreased and uniform distribution in the fusion zone. Furthermore, the fraction of the low-angle grain boundaries increased in the fusion zone. The hardness in the fusion zone is significant increase compared with CoCrFeNiCu high-entropy alloy, while is lower than that of stainless steel. The welded joint fractured at the CoCrFeNiCu high-entropy alloy base metal, and the fracture mechanism is ductile fracture. The ultimate tensile strength and ductility were 425?MPa and 32.5%, respectively. The result shown that the strength in the fusion zone is higher than that of CoCrFeNiCu high-entropy alloy base metal. The distributed homogeneously of Cu element, grain refinement and changes in misorientation angles are the origin of this joint obtained high strength. ? ASM International 2024.