Publication: The effect of multi-geometrical laser patterning of ti6al4v on dry sliding wear performance
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Date
2023-07-01
Authors
Mohitha Parameswaran
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Abstract
Place a book on a table and it remains static. To move it, tilt the table until the book slides or push until the pushing force is strong enough. The friction between the book and the table is what causes the resisting force, whereas the force used to move it is referred to as frictional force or friction. The purpose of this study was to ascertain how multi-geometrical laser textured surface would affect Ti6Al4V surface wear performance. The samples were subjected to laser texturing pre-set parameter values at 12 W power, 180 mm/s scanning speed, and 40 kHz frequency on Ti6Al4V to enhance the lifetime working performance of Ti6Al4V under fretting wear conditions of biomedical, automotive, dental, and orthopaedic implantations equipment industrial application. Then, the tribological behaviours of ball-on-flat configuration of 10 N load range, up to 20 rpm rotational speed, frictional force measurement up to 20 N and compound wear measurement if 1200μm with a reciprocating ball-and-flat module were performed for 30 minutes for each sample. In order to describe the surface morphological and topological profile of laser textured Ti6Al4V specimens, surface microhardness and etching were used. Related samples of Ti6Al4V that were received and Ti6Al4V had been laser textured had their respective surface profile, surface roughness, wear rate (WR), coefficient of friction (COF) and volume loss (𝑉𝑓) assessed under dry sliding conditions. The findings reveals that the oxidation that forms because of friction and plastic displacement acts as an abrasive behaviour onto the laser textured surface and resulted in the increasing of COF. The results showed that the circular geometrical texture has the lowest wear rate at 0.002 mm³/m.N and wear resistance of 51.43 among grid and triangular geometries. In the dry sliding wear test, the Ti6Al4V circular surface with laser texture had a wear rate that was 19% which is better than the Ti6Al4V untextured (23%), grid (32%) and triangular (27%) surfaces. It was established that Ti6Al4V might get significantly improved wear performance by LST.