Low-Temperature Diffusion Bonding Behavior of Hydrogenated Zr R60702  

作　　者：Jialin Zheng Longteng Li Huiping Wu Doudou Yang Bin Wang Dayong An Xifeng Li 

机构地区：[1]Institute of Forming Technology and Equipment,School of Materials Science and Engineering,Shanghai Jiao Tong University,Shanghai,200030,China [2]Luoyang Ship Material Research Institute,Luoyang,471023,China [3]Beijing Xinghang Electro-Mechanical Equipment Co.,Ltd.,Beijing,100074,China

出　　处：《Acta Metallurgica Sinica(English Letters)》2023年第10期1603-1618,共16页金属学报（英文版）

基　　金：supported by the NSFC-Liaoning Province United Foundation(U1908229);the National Natural Science Foundation of China(51875350);the Program of Shanghai Academic Research Leader(22XD1421600).

摘　　要：High temperature in diffusion bonding(DB)process severely deteriorates the performance of zirconium(Zr)R60702 in extreme chemical environment.Therefore,it is important to reduce the DB temperature of Zr R60702.In this work,low-temperature diffusion bonding of Zr R60702 at 750°C is realized by 0.3 wt%hydrogen addition while 900°C is required in DB process for unhydrogenated Zr R60702.The shear strength of the hydrogenated joint bonded at 750°C reaches 388 MPa,which is 117.98%higher than that of the unhydrogenated joint bonded at 750°C and equal to that of the unhydrogenated joint bonded at 900°C.The effects of hydrogen addition in Zr R60702 on the microstructure evolution,phase transformation temperature,interatomic bonding and self-diffusion coefficient of Zr atoms are investigated in detail.The results show that the optimized DB properties can be attributed to the improvements of its grain boundary diffusion,plasticity and self-diffusion coefficient of Zr atoms.

关 键 词：Low-temperature diffusion bonding HYDROGENATION Zr R60702 

分 类 号：TG1[金属学及工艺—金属学]