材料科学
摩擦学
表面粗糙度
摩擦学
润湿
奥氏体不锈钢
表面光洁度
压痕硬度
激光器
冶金
复合材料
酒窝
蓝宝石
微观结构
光学
腐蚀
物理
作者
José Mario Paiva,Jose M. DePaiva,Fred Lacerda Amorim,Ricardo Torres,Wagner de Rossi,Stephen C. Veldhuis
标识
DOI:10.1007/s00170-021-07284-z
摘要
Laser surface texturing (LST) is widely explored for modifying the surface topography of various materials. In this study, a detailed investigation of laser textured surfaces produced on austenitic stainless steel (AISI 304) was carried out. Three different textures (square, parallel, perpendicular) were produced by a Ti sapphire laser. The processed surfaces were characterized by surface morphology, phase structure, microhardness, surface roughness, and wettability. A ball-on-disk tribometer was used to study the tribological performance of both untextured and textured samples. The experimental observations demonstrate that LST improves both surface wettability and surface roughness. Average surface roughness (Ra) was increased by 350% and the contact angle was reduced from 43° to 22°. The textured surfaces show a lower coefficient of friction and better wear resistance than the untextured surface. Out of the investigated patterns, the square textures exhibited a maximum reduction of 68% in the friction coefficient and a 50% lower wear rate.
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