中文摘要：

采用两种冲击方式对AISI202不锈钢焊接接头表面进行激光冲击强化处理,利用X射线应力仪测试了激光冲击强化处理后焊接接头的残余应力,研究了单面和双面激光冲击对残余应力分布的影响,分析了残余压应力的形成机理。结果表明,双面激光冲击强化处理效果明显优于单面冲击方式,双面冲击方式能够使试样正反面都获得很大的残余压应力,并且反面的残余压应力水平高于正面,同时使得正反两面残余压应力分布趋于均匀。

英文摘要：

The surface of AISI202 stainless steel welding joint was processed by laser shock processing ( LSP) with two different methods. Residual stress of AISI202 welding joint treated by LSP was measured with X-ray stress tester.The effect of one-side and double-side LSP on the distribution of residual stress was investigated, and the generation mechanism of residual compressive stress was analyzed.The results show that the strengthening effect of double-side LSP is better than that of one-side LSP, both positive and negative sides are obtained large residual compressive stress after double-side LSP, and the negative residual compressive stress level is higher than that of the positive's, and the residual stress distribution of double sides becomes homogeneous.