镁合金材料表面缺口敏感性强、韧性低、抗腐蚀能力差等缺点严重制约了其轻质高强优势的发挥和应用。本项目提出采用"爆炸焊接+热/冷轧制"技术制备大面积覆铝镁基复合板材，探索铝/镁界面接合机理及塑性变形行为。研究铝/镁合金爆炸焊接过程的动力学行为、材料极速流变态势、大塑性变形位错滑移和接合界面形成等机制，探究塑性连接或微区冶金接合的微观机理、界面形态、组织结构、力学性能及其影响因素，分析铝/镁合金爆炸焊接的适应性和相容性的关键基础问题；研究铝/镁合金爆炸复合板轧制过程中的热力耦合问题，探究异种晶体结构连接界面的协调塑性变形的微观机制；进一步探讨覆铝镁基层状复合材料界面的静态和动态力学响应、界面损伤和断裂机理，建立镁基异质界面塑性变形模型，促进镁基层状复合材料塑性变形基础理论的发展。项目有助于镁基层状复合材料的合理设计制造、安全使用和服役寿命预测，具有较大的科学意义和应用价值。

As of high surface notch sensitivity, low toughness and poor corrosion resistance, magnesium alloy can not bring its light weight and high strength into fully play and thus ristrict its application in industry. A new technology is proposed to produce large area aluminum-coated magnesium composite sheet by explosive welding combined with hot/cold rolling in this project, and the bonding mechanism and plastic deformation behavior of Al/Mg interface will be studied. The dynamics, rheological state of material under high speed, dislocation sliding mode under large plastic deformation, and the forming mechanism of bonding interface in the process of Al/Mg explosive welding will be investigated. The mechanism of plastic bonding and micro-metallurgical bonding will be researched，and the interface mode, microstructure, mechanical properties and influencing factors will be discussed. The key and basic problems governing the adaptability and compatability of explosive welding aluminum and magnesium alloy will be analysed thoroughly. The thermo-mechanical coupling problem during the rolling process of explosive welded Al/Mg composite sheet will be analysed, and the micromechanism of coordinated plastic deformation of bonding interface of dissimilar crystal structures will be probed into. Furthermore, the static and dynamic mechanical behavior of the interface of aluminum coated magnesium composite sheet, the principle of bonding interface damage and fracture will be explored, and the plastic deformation model of magnesium alloy based heterogeneous interface will be set up to promote the development of foundamental theory of plastic deformation of magnesium alloy based laminated composite materials.The study results will contribute to the design and manufacture, safe use and service life prediction of magnesium alloy based laminated composite materials. It is of scientific significance and application value.