Coordinated Regulation of Bonding Interfacial Structure and Mechanical Properties of Al/Mg Alloy Composite Plates by Electrically Assisted Rolling  

作　　者：Tingting Zhang Xingrun An Yan Wang Gongbo Bian Tao Wang 

机构地区：[1]College of Mechanical and Vehicle Engineering,Taiyuan University of Technology,Taiyuan 030024,China [2]Engineering Research Center of Advanced Metal Composites Forming Technology and Equipment of Ministry of Education,Taiyuan University of Technology,Taiyuan 030024,China [3]National Key Laboratory of Metal Forming Technology and Heavy Equipment,Taiyuan University of Technology,Taiyuan 030024,China [4]College of Materials Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,China.

出　　处：《Chinese Journal of Mechanical Engineering》2025年第1期246-260,共15页中国机械工程学报(英文版)

基　　金：Supported by National Natural Science Foundation of China(Grant Nos.52075360,52275360,51805359).

摘　　要：Current research on the fabrication of rolled composite plates primarily focuses on processing and bonding mechanisms.Compared with hot-rolling technology,the electrically assisted rolling process has demonstrated excellent performance in interfacial bonding effects.However,the influence of different current loading modes on the interfacial recombination process of composite panels varies significantly.In this study,low-frequency electrically assisted rolling was used in the first pass to pre-bond a composite plate at a low reduction rate of 15%.High-frequency electrically assisted rolling was used during the second pass,and Al/Mg alloy composite plates were obtained.The interfacial microstructure and mechanical properties of the composite plate were coordinated regulation by designing the rolling reduction rate.The results showed the interfacial morphology of the alternating distribution of the melt-diffusion layer,diffusion layer,and the formation of a new Al/Mg bonding interface.At the melt-diffusion interface,the irregular intermetallic compounds(IMCs)and the new Al/Mg bonding interface were alternately distributed,and the IMCs contained theα-Mg,Mg17Al12,and Mg2Al3 phases.In addition,an extremely high shear strength of 78.26 MPa was achieved.Adhesion of the Mg alloy matrix was observed on the fracture surface of the Al alloy side.The high shear strength was mainly attributed to the formation of a unique interfacial structure and the appearance of a melt-diffusion layer.Compared to the diffusion-reduction interface,the regular rectangular IMCs and the new Al/Mg bonding interface were alternately distributed,and the IMCs consisted of the Mg17Al12 and Mg2Al3 phases.The shear test results showed that the shear strength of the interface reached 68.69 MPa,and a regular distribution of the Mg alloy matrix with dimples and the Al alloy matrix with a necking zone was observed on the fracture surface of the Al side.Tensile strength test results revealed a maximum value of 316.86 MPa for the Al/Mg alloy composite plate

关 键 词：Al/Mg alloy composite plate Electrically assisted rolling Bonding properties Interfacial structure 

分 类 号：TG146.2[一般工业技术—材料科学与工程]