Abstract
Excimer pulse laser is one of the processing tools which can effectively modify the metals surface by the retention of non-equilibrium characteristics. In the present study, Ti alloy is subjected to the excimer pulsed laser treatment at a fluence of ∼5 J cm−2 in argon atmosphere. The modified surface microstructures were analysed by TEM. The phase evaluation was done through XRD and TEM/SADP (Selected Area Diffraction Pattern). The effective changes in the tribological behaviour were evaluated by fretting wear test. After 10 pulse, ultrafine grains in the size range ∼100–700 nm were observed. However, 30 pulse treated sample showed the formation of nanocrystalline surface with grain size ∼30–70 nm and nanoscale twinning of spacing ∼10 nm. The wear characteristic was found to improve after laser treatment.
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