Tribology of laser modified surface of stainless steel in physiological solution

Singh, Raghuvir and Dahotre, N B (2005) Tribology of laser modified surface of stainless steel in physiological solution. Journal of Materials Science, 40 . pp. 5619-5626.

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The laser surface treatment of stainless steel (SS) 316L, an important alloy for biomedical applications, was used to improve its corrosion and wear-corrosion resistance in bio-environment. Microstructural and X-ray diffraction (XRD) pattern analysis showed presence of an austenitic phase in both untreated and laser-treated SS316L. Laser melting produced homogenized and refined microstructure on the surface with higher hardness (143–171 HV) compared to untreated SS316L (131 HV). Increase in intensity of γ (200) peaks in XRD pattern for laser-treated ( > 800 W) SS316L indicated possible crystallographic orientation along γ (200) plane. Passive currents were reduced to < 2.8 µ A/cm 2 and pitting potentials was increased to >+ 344 mV for samples laser surface treated at greater than 1200 W. The volume-loss and wear-rate of laser-treated SS316L were significantly reduced compared to untreated sample. Abrasive wear was the main wear mechanism for both untreated and laser surface treated SS316L. Wear particles/debris were found to be cold welded on the surface of SS316L and showed brittle cracking with further wear-straining.

Item Type:Article
Official URL/DOI:DOI:10.1007/s10853-005-1449-2
Uncontrolled Keywords:corrosion, laser processing, tribology, wear, stainless steel
Divisions:Corrosion and Surface Engineering
ID Code:4086
Deposited By:Dr. Raghuvir Singh
Deposited On:11 Oct 2011 12:42
Last Modified:09 Feb 2012 12:51
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