Bonse Jörn, Kirner Sabrina V, Griepentrog Michael, Spaltmann Dirk, Krüger Jörg
Bundesanstalt für Materialforschung und -Prüfung (BAM), Unter den Eichen 87, D-12205 Berlin, Germany.
Materials (Basel). 2018 May 15;11(5):801. doi: 10.3390/ma11050801.
Laser texturing is an emerging technology for generating surface functionalities on basis of optical, mechanical, or chemical properties. Taking benefit of laser sources with ultrashort (fs) pulse durations features outstanding precision of machining and negligible rims or burrs surrounding the laser-irradiation zone. Consequently, additional mechanical or chemical post-processing steps are usually not required for fs-laser surface texturing (fs-LST). This work aimed to provide a bridge between research in the field of tribology and laser materials processing. The paper reviews the current state-of-the-art in fs-LST, with a focus on the tribological performance (friction and wear) of specific self-organized surface structures (so-called ripples, grooves, and spikes) on steel and titanium alloys. On the titanium alloy, specific sickle-shaped hybrid micro-nanostructures were also observed and tribologically tested. Care is taken to identify accompanying effects affecting the materials hardness, superficial oxidation, nano- and microscale topographies, and the role of additives contained in lubricants, such as commercial engine oil.
激光纹理化是一种基于光学、机械或化学特性来生成表面功能的新兴技术。利用具有超短（飞秒）脉冲持续时间的激光源，其加工精度极高，并且激光辐照区域周围的边缘或毛刺可忽略不计。因此，飞秒激光表面纹理化（fs-LST）通常不需要额外的机械或化学后处理步骤。这项工作旨在在摩擦学领域的研究与激光材料加工之间架起一座桥梁。本文综述了fs-LST的当前技术水平，重点关注钢和钛合金上特定自组织表面结构（所谓的波纹、凹槽和尖峰）的摩擦学性能（摩擦和磨损）。在钛合金上，还观察到了特定的镰刀形混合微纳结构并对其进行了摩擦学测试。我们谨慎地识别了影响材料硬度、表面氧化、纳米和微观尺度形貌的伴随效应，以及润滑剂（如商用发动机油）中所含添加剂的作用。
