Laser surface textured titanium alloy (Ti–6Al–4V): Part 1 – Surface characterization

•Texturing of Ti–6Al–4V with linear and dimple patterns are developed with ArF laser.•Linear textures have width of 25μm and are at an interval of 20μm.•Dimple textures are equi-spaced and have a diameter of 60μm.•Significant refinement of microstructure in textured zone as compared to substrate.•In...

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Bibliographic Details
Published in:	Applied surface science 2015-11, Vol.355, p.104-111
Main Authors:	Pfleging, Wilhelm, Kumari, Renu, Besser, Heino, Scharnweber, Tim, Majumdar, Jyotsna Dutta
Format:	Article
Language:	eng
Subjects:	Dimpling Electron back scatter diffraction Laser surface texturing Microstructure Surface energy Surface layer Surface roughness Texture Texturing Titanium base alloys Wettability XRD
Online Access:	Get full text
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Summary:	•Texturing of Ti–6Al–4V with linear and dimple patterns are developed with ArF laser.•Linear textures have width of 25μm and are at an interval of 20μm.•Dimple textures are equi-spaced and have a diameter of 60μm.•Significant refinement of microstructure in textured zone as compared to substrate.•Increased wettability of the textured surface against simulated body fluid. In the present study, a detailed study of the characterization of laser-surface textured titanium alloy (Ti–6Al–4V) with line and dimple geometry developed by using an ArF excimer laser operating at a wavelength of 193nm with a pulse length of 5ns is undertaken. The characterization of the textured surface (both the top surface and cross section) is carried out by scanning electron microscopy, electron back scattered diffraction (EBSD) technique and X-ray diffraction techniques. There is refinement of microstructure along with presence of titanium oxides (rutile, anatase and few Ti2O3 phase) in the textured surface as compared to as-received one. The area fractions of linear texture and dimple texture measured by image analysis software are 45% and 20%, respectively. The wettability is increased after laser texturing. The total surface energy is decreased due to linear (29.6mN/m) texturing and increased due to dimple (67.6mN/m) texturing as compared to as-received Ti–6Al–4V (37mN/m). The effect of polar component is more in influencing the surface energy of textured surface.
ISSN:	0169-4332 1873-5584