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Surface modification of powder metallurgy components with a direct diode laser

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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. doi:10.1115/1.1605111 ISSN 0094-4289.

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Official URL: http://dx.doi.org/10.1115/1.1605111

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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, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group)
Journal or Publication Title: Journal of Engineering Materials and Technology
Publisher: ASME International
ISSN: 0094-4289
Official Date: October 2003
Dates:
DateEvent
October 2003Published
Volume: Volume 125
Number: Number 4
Number of Pages: 6
Page Range: pp. 372-377
DOI: 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.

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