Abstract Various surface engineering techniques have been developed to improve the tribological performance at tribo-contacts. In particular, research efforts have been put on either enhancing the wear resistance through surface strengthening processes or manipulating the coefficient of friction (COF) through surface patterning processes. A new material process integrating both strengthening and patterning effects might lead to broader impacts in tribology research and applications. In this study, a novel laser-based surface processing technique, named indirect-laser shock surface patterning (indirect-LSSP), is developed. This process utilizes the laser-induced shockwave loadings to introduce the surface strengthening and patterning effects simultaneously, leading to the fabrication of anti-skew surfaces with arrays of micro-indentations for the enhanced wear resistance and manipulated friction values. Indirect-LSSP experiments were carried out on AISI 1045 steels. The 3D surface profiles after LSSP were characterized. The hardness of surface patterns prepared by laser processing was measured. The friction values as affected by laser processing parameters were measured by sliding tests. The relationships among laser processing parameters, micro-feature characteristics, and COF were discussed.

中文翻译：

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通过间接激光冲击表面图案化处理摩擦系数的表面纹理

摘要 已经开发了各种表面工程技术来改善摩擦接触处的摩擦学性能。特别是，研究工作已投入到通过表面强化工艺提高耐磨性或通过表面图案化工艺控制摩擦系数 (COF) 上。一种结合强化和图案化效应的新材料工艺可能会对摩擦学研究和应用产生更广泛的影响。在这项研究中，开发了一种新型的基于激光的表面处理技术，称为间接激光冲击表面图案化 (indirect-LSSP)。该过程利用激光诱导的冲击波载荷同时引入表面强化和图案化效果，导致制造具有微压痕阵列的抗歪斜表面，以提高耐磨性和操纵摩擦值。在 AISI 1045 钢上进行了间接 LSSP 实验。表征 LSSP 后的 3D 表面轮廓。测量通过激光加工制备的表面图案的硬度。通过滑动试验测量受激光加工参数影响的摩擦值。讨论了激光加工参数、微特征特征和COF之间的关系。通过滑动试验测量受激光加工参数影响的摩擦值。讨论了激光加工参数、微特征特征和COF之间的关系。通过滑动试验测量受激光加工参数影响的摩擦值。讨论了激光加工参数、微特征特征和COF之间的关系。