中文摘要：

为了研究激光冲击强化（LSP）过程中冲击波柔性加载条件下靶材的表面形貌与变形机理的联系,采用短脉冲强激光对304奥氏体不锈钢表面进行LSP处理,在没有对材料表面进行腐蚀的条件下,利用光学显微镜直接观察了LSP处理后材料的表面,并分析了其表面形貌特征与形成机理。研究发现,表面形貌呈现了多晶面心立方（FCC）金属的塑性变形特征,所浮现的形变组织能够直接反映材料在冲击波加载下的变形机制。实验结果表明,激光冲击后材料的表面形貌与塑性变形机制具有对应关系,这为LSP处理的变形机理的研究提供了一种新的实验方法。

英文摘要：

To study the relation between the surface morphology and the deformation mechanism of the target material under the flexible loading shock condition,in laser shock peening（LSP）,the surface morphology of 304 austenite stainless steels treated by LSP is investigated using the optical microscope.The surface features observed present the characteristics of plastic deformation in the polycrystalline face centered cubic（FCC） metal.The surface microstructure can directly represent the deformation mechanism of the material under shock wave loading.The experimental results show that the surface morphology of the treated material corresponds to the deformation mechanism,which provides a new experimental method of studying the deformation mechanism in LSP.