Abstract Additive manufacturing is gaining a remarkable importance in manufacturing industries because of the ability to build parts with complex and intricate shapes. The most widely used material in additive manufacturing is the polymer. In this paper, circular textures have been 3D printed on the surface of Polylactic Acid (PLA) polymer using fused deposition modelling technique. Experiments were performed under dry and lubricated conditions by varying the texture size. The results were obtained for high and low speeds with varying loads of 10, 20, 30, 40 and 50 N. It was observed that coefficient of friction was minimum for texture T2 at both high and low speeds under dry sliding conditions. This is due to the less real area of contact than texture T1 and more effective formation of transfer film in case of texture T3. The entrapment of wear debris is more effective which helps in the formation of transfer layer that acts as solid lubricant. Under lubricated conditions, it was observed that for low speed, texture T3 has least coefficient of friction while at high speed texture T1 resulted in the minimum coefficient of friction. This is mainly due to the more retention of lubricating oil for texture T3 at low speed in comparison to the high speed. Surface analysis carried out for all the textures under dry sliding conditions revealed that the wear is mainly to adhesive and abrasive action.

中文翻译：

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表面纹理对 3D 打印聚乳酸 (PLA) 摩擦行为的影响

摘要 增材制造在制造业中越来越重要，因为它能够制造出形状复杂的零件。增材制造中使用最广泛的材料是聚合物。在本文中，使用熔融沉积建模技术在聚乳酸 (PLA) 聚合物表面 3D 打印了圆形纹理。通过改变纹理尺寸，在干燥和润滑条件下进行实验。结果是在高速和低速下以 10、20、30、40 和 50 N 的变化负载获得的。据观察，在干滑动条件下，在高速和低速下，纹理 T2 的摩擦系数最小。这是由于与纹理 T1 相比实际接触面积较小，并且在纹理 T3 的情况下更有效地形成转移膜。磨损碎屑的截留更有效，这有助于形成作为固体润滑剂的转移层。在润滑条件下，观察到在低速下，纹理 T3 的摩擦系数最小，而在高速下，纹理 T1 的摩擦系数最小。这主要是由于与高速相比，在低速下对质地 T3 的润滑油保留更多。在干滑动条件下对所有纹理进行的表面分析表明，磨损主要是粘附和磨蚀作用。纹理 T3 的摩擦系数最小，而在高速下，纹理 T1 的摩擦系数最小。这主要是由于与高速相比，在低速下对质地 T3 的润滑油保留更多。在干滑动条件下对所有纹理进行的表面分析表明，磨损主要是粘附和磨蚀作用。纹理 T3 的摩擦系数最小，而在高速下，纹理 T1 的摩擦系数最小。这主要是由于与高速相比，在低速下对质地 T3 的润滑油保留更多。在干滑动条件下对所有纹理进行的表面分析表明，磨损主要是粘附和磨蚀作用。