探索激光冲击强化（LSP）处理提高材料力学性能的物理本质及其优异性能的稳定性是当下学界的热点。本项目立足于多学科交融尤其是材料动态行为的视角，综合运用TEM/HREM、EBSD、SAXS、SWXRD等先进实验技术，对LSP超高应变速率变形过程中金属表层微结构/残余应力的特征及形成机制予以透视与剖析，揭示LSP处理后力学性能大幅提升的本质原因；基于“热-力”耦合的理念和方法，集成超高应变率形变、动态应变时效、动态析出、静态时效等的优势，实现沉淀相对位错/晶界“钉扎效应”的最大化，整体设计并力图发展出提高LSP诱生的特征微结构/残余应力稳定性技术原型；耦合实验和理论分析，揭示沉淀相的种类、尺寸、分布对“钉扎效应”的影响规律与机制，力图建立提高“稳定性”的原理。. 本项目的知识创新将丰富和发展材料动态行为、形变热处理等的理论知识，为探索开发LSP新技术提供实验和理论支撑。

Exploring of the physical essence of the excellent properties of materials processed by laser shock peening (LSP) and the exploration of the stability of their excellent performance are the research focuses in the current academic fields. . The micro/nano-structure evolution mechanism of the aluminum alloy surface in the process of ultra-high-strain-rate plastic deformation induced by LSP will be investigated based on multi-disciplinary blending especially on the perspectives of the dynamic behavior of materials. Advanced experimental techniques such as EBSD/SEM、TEM/HREM、SR-SAXS and SWXR will be comprehensively used in the present project.. A technique for stability of the microstructure/residual stress acquired by LSP will be designed and developed based on the thermal-mechanical coupling theory as well as method. The realization of the optimization of the dislocation/grain boundary pinning effect will be carried out based on the integration of the advantages of the ultra-high-strain-rate deformation, dynamic strain aging, dynamic precipitation, and static aging mechanisms. The influence of nano-precipitate’s types, sizes and distributions on the dislocation / grain boundary pining effect will be investigated by means of the theoretical/experimental coupling method.. The principle to improve the stability of the microstructure / residual stress induced by LSP will try to be developed, and then the useful references for the physical metallurgy of other thermo-mechanical treatment will be provided.