Barnes, Stuart, Nash, Michael J. and Kwok, Y. K.. (2003) Surface modification of powder metallurgy components with a direct diode laser. Journal of Engineering Materials and Technology, Volume 125 (Number 4). pp. 372-377. ISSN 0094-4289

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Abstract

A 1200 W diode laser was used to modify the surface properties of a fully-sintered ferrous PM material. Two modifications were investigated; transformation hardening of selected areas and sealing of surface porosity by re-melting. The diode laser was used because the beam footprint is large (5 x 0.5 mm) and the wavelength short (0.94 mum). Processed samples were examined using metallographic and hardness testing techniques. Results indicated that hardness comparable to induction hardening could be achieved and re-melting could be controlled to seal porosity. Further work now needs to be undertaken to convert this demonstrated potential into a commercial reality.

Item Type:	Journal Article
Subjects:	T Technology > TJ Mechanical engineering and machinery T Technology > TA Engineering (General). Civil engineering (General)
Divisions:	Faculty of Science > WMG (Formerly the Warwick Manufacturing Group)
Journal or Publication Title:	Journal of Engineering Materials and Technology
Publisher:	ASME International
ISSN:	0094-4289
Date:	October 2003
Volume:	Volume 125
Number:	Number 4
Number of Pages:	6
Page Range:	pp. 372-377
Identification Number:	10.1115/1.1605111
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access
Version or Related Resource:	Barnes, S., Nash, M. J., Kwok, Y. K., “Surface Modification of Powder Metallurgy Components with a Direct Diode Laser”, Proc. of the ASME International Mechanical Engineering Congress and Exposition, Nov. 17-22, 2002, New Orleans, Louisiana, USA.
URI:	http://wrap.warwick.ac.uk/id/eprint/9228

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