Abstract A periodic micro-groove was fabricated on the surface of LY2 aluminum samples using a picosecond laser system, and then the samples were subjected to a laser shock wave planishing (LSWP) treatment. The deformation of micro-features was evaluated using a non-contact 3D profilometer. The experimental results show that LSWP can effectively lower the height of the micro-features. An axisymmetric 2D model was constructed to simulate the dynamic response of the micro-features at a strain rate of 106 s−1. The profile of micro-features predicted from the finite element modeling matches quite well with the experimental results. The simulated dynamic deformation of micro-features clearly reveals the plastic flow behaviors of the surface materials after the LSWP treatment and provides useful optimized LSWP parameters to control the roughness and profile accuracy of the treated surface.

中文翻译：

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激光冲击波抛光技术下表面微观特征的动态响应

摘要 使用皮秒激光系统在LY2铝样品表面制作周期性微凹槽，然后对样品进行激光冲击波抛光（LSWP）处理。使用非接触式 3D 轮廓仪评估微观特征的变形。实验结果表明，LSWP 可以有效降低微特征的高度。构建了一个轴对称二维模型来模拟微观特征在 106 s-1 应变速率下的动态响应。从有限元建模预测的微观特征的轮廓与实验结果非常吻合。