覆铝镁基复合板材是改善镁合金强韧性和耐蚀性，拓展镁合金应用的有效途径。本项目提出“高频交流+低频脉冲”电流作用实现铝/镁层状复合板材的连续轧制连接技术，重点研究其电致塑性连接界面接合机制。探索高频交流电在铝/镁连接表面的邻近效应和趋肤效应，异质界面会合区的放电现象和双侧氧化膜破碎去除机制；探究接触区的焦耳热效应、电致塑性效应及压力区的塑性连接机理。揭示复合电流作用对铝/镁材料的位错运动、织构行为及塑性流变应力的影响机理，低频脉冲电流对连接界面形貌的影响规律；剖析铝/镁连接界面的协调塑性变形行为，阐释其对界面接合的重要贡献。创建数值模型阐明电致塑性效应作用下异质连接界面的热力学和动力学行为，进而揭示铝/镁复合板连接界面的微观接合机制。进一步表征连续轧制铝/镁复合板材界面微观组织、接合强度和宏观力学性能。该研究将丰富层状复合板的制造理论和异质材料连接技术，为金属基复合板材产业化提供理论基础。

Cladding aluminum on a magnesium alloy plate provides an effective way to improve the plate’s toughness and corrosion resistance, thus broadening its applications. In this project, an innovative continuous rolling technology assisted with high-frequency alternating & low-frequency pulsed currents is proposed to fabricate such Al/Mg alloy clad plates. The focus of this study is on the bonding mechanism of electro-plastic bonding interface. The proximity effect and skin effect of high-frequency alternating current at the Al/Mg bonding interface will be investigated along with the discharge phenomena and oxide film removing mechanism at the heterogeneous interface. Joule heating and electro-plastic effect in contact zones and plastic deformation bonding mechanism in pressurized regions will also be studied. Effects of currents on dislocation motion, texture behavior, and plastic flow stress will be examined, as well as low-frequency pulsed current’s influence on bonding interfacial morphology. The effect of synergy between the applied currents on plastic deformation behaviors at the Al/Mg bonding interface will be analyzed. A mathematical model will be developed to elucidate the thermodynamic and kinetic behaviors at the heterogeneous bonding interface under the electro-plastic effect, thus to further understand the interfacial bonding mechanism of the Al/Mg clad plate. The microstructure, strength, and other macroscopic mechanical properties of the bonding interface of the Al/Mg clad plate will also be characterized. This proposed research can enrich the laminated clad plate fabrication theory and the bonding technology of heterogeneous metals, providing a theoretical basis for the industrialization of metal-based clad plates.