Influence of laser surface modification on corrosion behavior of stainless steel 316L and Ti-6Al-4V in simulated biofluid

Singh, Raghuvir and Martin, M and Dahotre, N B (2005) Influence of laser surface modification on corrosion behavior of stainless steel 316L and Ti-6Al-4V in simulated biofluid. Surface Engineering, 21 (4). pp. 297-306.

Restricted to NML users only. Others may use ->



Laser surface engineering has been explored as a possible method for improving the functional surface properties of biomedical materials such as stainless steels and titanium alloys. This study emphasises the influence of laser surface processing, carried out at a range of laser powers from 500 to 1500 W in ambient atmosphere, on the surface microstructure and corrosion behaviour of stainless steel 316L (SS316L) and Ti-6Al-4V, and metal ions released during the corrosion process. A homogeneous surface microstructure includes columnar dendrites and fine grains in the resolidified region of SS316L. A gradual increase in grain size from the processed surface towards the substrate was revealed, The laser processing of Ti-6Al-4V produced a surface full of dendrites followed by acicular martensite in the interface region. The corrosion studies in Ringer's physiological solution showed an increase in the open circuit potential (OCP) as a result of laser surface treatment of both SS316L and Ti-6Al-4V (more noble than untreated). After laser processing, the corrosion properties of SS316L were seen to deteriorate, and those of Ti-6Al-4V to improve, as compared to their respective untreated counterparts. The variation of laser power influenced the corrosion resistance of SS316L, while that of Ti-6Al-4V did not vary significantly. Laser surface treatments at higher powers (> 1000 W) reduced the leaching of specific metallic ions from SS316L and Ti-6Al-4V during corrosion in Ringer's physiological solution

Item Type:Article
Official URL/DOI:DOI: 10.1179/174329405X55320
Uncontrolled Keywords:biomaterials; corrosion resistance; dendritic microstructure; electrochemical polarisation; E-pH diagram; laser surface melting; metal ion release; open circuit potential; passive current; pitting corrosion; Ringer's solution; SS316L; surface modification; Ti6Al4V; TiO2
Divisions:Corrosion and Surface Engineering
ID Code:3351
Deposited By:Sahu A K
Deposited On:14 Jul 2011 16:58
Last Modified:23 May 2012 14:01
Related URLs:

Repository Staff Only: item control page