Interface enhancement mechanism of rolled Mg/Al clad plate with particle interface control  

作　　者：Xiaobao Ma Peng Li Tao Wang Zhongkai Ren Peng Chen Jiang Ji 

机构地区：[1]College of Mechanical and Vehicle Engineering,Taiyuan University of Technology,Taiyuan 030024,China [2]Ministry of Education Engineering Research Center of Advanced Metal Composite Forming Technology and Equipment,Taiyuan University of Technology,Taiyuan 030024,China [3]Shanxi Engineering Research Center for Metal Composites Forming Process and Equipment,Taiyuan University of Technology,Taiyuan 030024,China [4]China National Heavy Machinery Research Institute Co.,Ltd,Xi’an 710032,China

出　　处：《Journal of Magnesium and Alloys》2024年第12期5079-5094,共16页镁合金学报(英文)

基　　金：funded by the National Natural Science Foundation of China(Grant No.52305405,52075359);the Natural Science Foundation Research Program of Shanxi Province(Grant No.202203021222121);the Fund for Shanxi“1331Project”Key Innovative Research Team;the Chinese Postdoctoral Science Foundation(Grant No.2021M702544)。

摘　　要：In this study,the cold-spraying process was utilized to deposit Al particles onto an Al slab,an Mg slab,and both Al and Mg slabs to form an ultra-thin interlayer,and then the clad slabs were rolled at 400℃,developing three roll-bonding processes:the roll-bonding process with cold-sprayed Al powder on the Al slab(CS-Al),the roll-bonding process with cold-sprayed Al powder on the Mg slab(CS-Mg),and the rollbonding process with cold-sprayed Al powder on both the Al slab and the Mg slab(CS-Both).The effects of three different cold-sprayed Al particle interlayer processes on the mechanical properties of rolled Mg/Al clad plates were investigated to improve the mechanical properties.The microstructure,texture evolution,intermetallic compound formation,mechanical properties,and mechanisms involved in the Mg/Al clad plate rolling were systematically investigated.The results showed that the pre-bonding between the particles and the substrates through coldspraying had a significant impact on the bonding strength of the Mg/Al clad plates,and the CS-Both process can increase the average shear strength of the Mg/Al clad plates to 49.24 MPa at a medium reduction rate of 37.5%,2.5 times that of the conventional rolling process.The CS-Both process constructed more evident dual microscopic three-dimensional interfaces and promoted more thorough atomic diffusion at the interface through the double-sided cold-spraying process.Meanwhile,the dual cold-sprayed Al coatings on both the Mg slab and Al slab underwent dynamic recrystallization during rolling to form a homogeneous unit with no additional coating interfaces.Fine grain strengthening and dislocation strengthening were judged to be important mechanisms for improving the mechanical performance of the interfacial layer.

关 键 词：Cold-sprayed interlayer processes Mg/Al clad plate Roll-bonding Particle interface Mechanical interlocking Microscopic three-dimensional interface 

分 类 号：TG335.81[金属学及工艺—金属压力加工]