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Laser surface processing with controlled nitrogen-argon concentration levels for regulated surface life time

Ahmed Obeidi, Muhannad orcid logoORCID: 0000-0003-2733-3828, McCarthy, Éanna and Brabazon, Dermot orcid logoORCID: 0000-0003-3214-6381 (2017) Laser surface processing with controlled nitrogen-argon concentration levels for regulated surface life time. Optics and Lasers in Engineering, 102 . pp. 154-160. ISSN 0143-8166

Abstract
Laser surface modification can be used to enhance the mechanical properties of a material, 1such as hardness, toughness, fatigue strength, and corrosion resistance. Surface nitriding is a widely used thermochemical method of surface modification, in which nitrogen is introduced into a metal or other material at an elevated temperature within a furnace. It is used on parts where there is a need for increased wear resistance, corrosion resistance, fatigue life, and hardness. Laser nitriding is a novel method of nitriding where the surface is heated locally by a laser, either in an atmosphere of nitrogen or with a jet of nitrogen delivered to the laser heated site. It combines the benefits of laser modification with those of nitriding. Recent work on high toughness tool steel samples has shown promising results due to the increased nitrogen gas impingement onto the laser heated region. Increased surface activity and nitrogen adsorption was achieved which resulted in a deeper and harder surface compared to conventional hardening methods. In this work, the effects of the laser power, pulse repetition frequency, and overlap percentage on laser surface treatment of 316L SST steel samples with an argon-nitrogen jet will be presented. Resulting microstructure, phase type, microhardness, and wear resistance are presented.
Metadata
Item Type:Article (Published)
Refereed:Yes
Uncontrolled Keywords:argon; argon-nitrogen mixture; Higher wear/hardness improvement
Subjects:Engineering > Mechanical engineering
DCU Faculties and Centres:Research Initiatives and Centres > Advanced Processing Technology Research Centre (APTRC)
DCU Faculties and Schools > Faculty of Engineering and Computing > School of Mechanical and Manufacturing Engineering
Publisher:Elsevier
Official URL:https://doi.org/10.1016/j.optlaseng.2017.11.007
Copyright Information:© 2017 Elsevier
Use License:This item is licensed under a Creative Commons Attribution-NonCommercial-Share Alike 3.0 License. View License
Funders:Enterprise Ireland under grant IP 2016 0517
ID Code:22299
Deposited On:28 Mar 2018 15:36 by Thomas Murtagh . Last Modified 12 Aug 2021 09:44
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