文献类型：期刊文献

英文题名：Microstructure and mechanical response of the DD5 single crystal and FGH98 superalloy joint diffusion bonded using Al0.3FeCoNiCr high entropy alloy interlayer

作者：Tian, Fuqiang[1];Shi, Junmiao[1];Jin, Feng[2];Sun, Xianjun[2];Li, Jinglong[2];Zhang, Xiancheng[1]

机构：[1]East China Univ Sci & Technol, Key Lab Pressure Syst & Safety, Minist Educ, Shanghai 200237, Peoples R China;[2]Northwestern Polytech Univ, Shaanxi Key Lab Frict Welding Technol, Xian 710072, Peoples R China

年份：2022

卷号：854

外文期刊名：MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING

收录：;EI(收录号：20223512666551);WOS:【SCI-EXPANDED(收录号:WOS:000850056800003)】；

基金：This study was supported by the National Natural Science Founda- tion of China (No. 52005410) and the China Postdoctoral Science Foundation (No. 2019TQ0263, No. 2020M683560) .

语种：英文

外文关键词：Diffusion bonding; High entropy alloy interlayer; Microstructure; Property

摘要：In this study, the DD5 single crystal and FGH98 superalloy were diffusion bonded using Al0.3FeCoNiCr high entropy alloy interlayer (HEA interlayer). The microstructure evolution and mechanical property of the joint were investigated in detail. During the diffusion bonding process, the C, Ti, and Ta released by the FGH98 and HEA interlayer reacted to form carbide at the FGH98/HEA interlayer interface, achieving reliable interfacial bonding. The concentration gradient at the HEA interlayer/DD5 interface promoted the Ni and Al to diffuse from the DD5 to the HEA interlayer, inducing the decomposition of the gamma ' phase in the DD5 substrate adjacent to the joining interface. The diffusion zone comprised of tiny gamma ' and residual gamma' bulk formed at the HEA interlayer/DD5 interface. With the increase of the diffusion bonding temperature, the diffusion of elements at the interface was sufficient. The carbide at the FGH98/HEA interlayer interface grew into a continuous line, and the diffusion zone at HEA interlayer/DD5 interface thickened significantly. The maximum shear strength was 541 MPa when the DD5 and FGH 98 were diffusion bonded at 1130 ?C for 1 h. The fracture initiated from the carbide and prop-agated in the FGH98/HEA interlayer interface.