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Optimization of Ytterbium Laser Parameters for Texturing of Steel Surfaces

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Document pages: 5 pages

Abstract: Laser surface texturing is used to improve the tribological properties of the sliding surface. Optimizing the laser parameters to get appropriate texture diameter and depth is one of the challenges for tribologist. In the present study, the effect of Ytterbium laser parameters on dimple depth and diameters is investigated. Steel samples with hardness 380HV and Young’s Modulus 200GPa are used. Surface texturing on steel sample surface is done by using an Ytterbium fiber laser system (iPG photonics), with a maximum laser power of 20W, wavelength of 1064nm, maximum frequency of 80 kHz. Input laser parameters (frequency, speed, power, and pulse) are varied to investigate its effect on dimple dimensions and finally optimized. An optical profilometer is used to measure the topography of laser textured samples. Based on the results, it has been found that with an increase in laser power; depth and diameter of dimples are increasing. Contrastingly with an increase in frequency and speed, depth of dimples keeps on decreasing. Variation in pulse length doesn’t show any significant change in dimple dimensions.

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