Type

Journal Article

Authors

Dermot Brabazon
Sumsun Naher
Evans Chikarakara

Subjects

Engineering

Topics
surface energy mechanical engineering laser applications 316l stainless steel biomedical engineering materials laser surface modification biomedical applications

Process mapping of laser surface modification of AISI 316L stainless steel for biomedical applications (2010)

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 ┬Ás 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.
Collections Ireland -> Dublin City University -> Publication Type = Article
Ireland -> Dublin City University -> Status = Published
Ireland -> Dublin City University -> DCU Faculties and Centres = DCU Faculties and Schools: Faculty of Engineering and Computing: School of Mechanical and Manufacturing Engineering
Ireland -> Dublin City University -> Subject = Engineering: Mechanical engineering
Ireland -> Dublin City University -> Subject = Engineering: Materials
Ireland -> Dublin City University -> Subject = Engineering
Ireland -> Dublin City University -> Subject = Engineering: Biomedical engineering
Ireland -> Dublin City University -> DCU Faculties and Centres = Research Initiatives and Centres
Ireland -> Dublin City University -> DCU Faculties and Centres = DCU Faculties and Schools
Ireland -> Dublin City University -> DCU Faculties and Centres = DCU Faculties and Schools: Faculty of Engineering and Computing
Ireland -> Dublin City University -> DCU Faculties and Centres = Research Initiatives and Centres: Materials Processing Research Centre (MPRC)

Full list of authors on original publication

Dermot Brabazon, Sumsun Naher, Evans Chikarakara

Experts in our system

1
Dermot Brabazon
Dublin City University
Total Publications: 162
 
2
Sumsun Naher
Dublin City University
Total Publications: 56