文献类型：期刊文献

英文题名：Microstructure evolution and mechanical properties of diffusion bonding CoCrCuFeNi high entropy alloy to Inconel 600 alloy

作者：Zhao, Honglong Zhou, Fugui Shen, Xuefeng Li, Juan Qin, Qingdong Wu, Jianming

机构：[1] Key Laboratory of Light Metal Materials Processing Technology of Guizhou Province, Guizhou Institute of Technology, Guiyang, 550003, China; [2] Department of Materials & Energy Engineering, Guizhou Institute of Technology, Guiyang, 550003, China; [3] 2011 Special Functional Materials Collaborative Innovation Center of Guizhou Province, Guiyang, 550003, China

第一机构：贵州理工学院材料与冶金工程学院

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

年份：2024

卷号：33

起止页码：8372-8390

外文期刊名：Journal of Materials Research and Technology

收录：EI(收录号：20244717407848);Scopus(收录号：2-s2.0-85209638082)

语种：英文

外文关键词：Brittle fracture - Cobalt alloys - Copper - Copper alloys - Diffusion bonding - Ductile fracture - Fracture mechanics

摘要：In this study, the CoCrCuFeNi high entropy alloy was diffusion bonded with the Inconel 600 superalloy at bonding temperatures ranging from 950 to 1100 °C for a bonding time of 2 h under a pressure of 20 MPa in a vacuum. The microstructure and mechanical properties of the diffusion bonded joints were investigated. The diffusion zone of the welded joint contains of two distinct zones: a coarse grain zone (on the Inconel 600 superalloy side) and the diffusion interface layer. The blocks Cr23C6 phase and Cu-rich phase were formed in the diffusion interface layer at 950 °C. As the bonding temperature increased, the Cr23C6 gradually disappeared and the blocks Cu-rich phase transformed into nano Cu-rich precipitate in the diffusion interlayer at 1100 °C. The hardness of the interface layer was significantly higher than that of the base metal at all temperature. When the bonding temperature increased from 950 °C to 1100 °C, the ultimate tensile strength of the welded joints increased from 521 MPa to 558 MPa, and the elongation increased from 10.3 % to 31.2%, respectively. The ultimate tensile strength reached 96 % and 82 % than that of the CoCrCuFeNi HEA and Inconel 600 base metal, and the elongation is comparable to that of the base metals. All the welded joint fracture near the diffusion interface layer. As the bonding temperature increased, the fracture mode of the joint transformed brittle to ductile. At an elevated temperature of 300 °C, the ultimate tensile strength and elongation of the welded joint are 325 MPa and 9.8 %, respectively. The welded joint exhibits a mixed fracture mode of ductile and cleavage fractures. ? 2024 The Authors