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Process mapping of laser surface modification of AISI 316L stainless steel for biomedical applications

Chikarakara, Evans and Naher, Sumsun and Brabazon, Dermot (2010) Process mapping of laser surface modification of AISI 316L stainless steel for biomedical applications. Applied Physics A: Materials Science & Processing, 101 (2). pp. 367-371. ISSN 1432-0630

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Abstract

A 1.5-kW CO2 laser in pulsed mode at 3 kHz was used to investigate the effects of varied laser process parameters and resulting morphology of AISI 316L stainless steel. Irradiance and residence time were varied between 7.9 to 23.6 MW/cm2 and 50 to 167 µs respectively. A strong correlation between irradiance, residence time, depth of processing and roughness of processed steel was established. The high depth of altered microstructure and increased roughness were linked to higher levels of both irradiance and residence times. Energy fluence and surface temperature models were used to predict levels of melting occurring on the surface through the analysis of roughness and depth of the region processed. Microstructural images captured by the SEM revealed significant grain structure changes at higher irradiances, but due to increased residence times, limited to the laser in use, the hardness values were not improved.

Item Type:Article (Published)
Refereed:Yes
Additional Information:The original publication is available at www.springerlink .com
Subjects:Engineering > Materials
Engineering > Mechanical engineering
Engineering > Biomedical engineering
DCU Faculties and Centres:Research Initiatives and Centres > Materials Processing Research Centre (MPRC)
DCU Faculties and Schools > Faculty of Engineering and Computing > School of Mechanical and Manufacturing Engineering
Publisher:Springer Berlin / Heidelberg
Official URL:http://dx.doi.org/10.1007/s00339-010-5843-5
Copyright Information:© Springer-Verlag 2010
Use License:This item is licensed under a Creative Commons Attribution-NonCommercial-Share Alike 3.0 License. View License
Funders:OVPR DCU
ID Code:15869
Deposited On:16 Nov 2010 16:24 by Mr Evans Chikarakara. Last Modified 20 Oct 2014 15:50

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