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

通信作者：He, F[1]

机构：[1]Guizhou Univ, Coll Mat & Met, Guiyang 550025, Guizhou, Peoples R China;[2]Guizhou Inst Technol, Key Lab Light Met Mat Proc Technol Guizhou Prov, Guiyang 550003, Peoples R China;[3]2011 Special Funct Mat Collaborat Innovat Ctr Guiz, Guiyang 550003, Peoples R China;[4]Guizhou Hangrui Aviat Precis Parts Mfg Co Ltd, Zhunyi 563000, Peoples R China

第一机构：Guizhou Univ, Coll Mat & Met, Guiyang 550025, Guizhou, Peoples R China

通信机构：corresponding author), Guizhou Univ, Coll Mat & Met, Guiyang 550025, Guizhou, Peoples R China.

年份：2024

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);WOS:【SCI-EXPANDED(收录号:WOS:001285284400005)】；

基金：This work was supported by the Guizhou Province Science and Technology Planning Project (Qianke He Jichu ZK [2022] Yiban175), Guizhou Province High Level Innovative Talents (No. Qianke He Platform and Talent (2022) 011-1), National Natural Science Foundation of China (No. 51964011) and Key Laboratory of Light Metal Materials Processing of Guizhou Province ((2016) 5104), Natural Science Project of Guizhou Provincial Education Department (Qianjiaoji (2022) 034 and Qianjiaoji (2023) 078).

语种：英文

外文关键词：fiber laser welding; high-entropy alloys; mechanical properties; microstructure; stainless steel

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.