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Simultaneous wire- and powder-feed direct metal deposition: An investigation of the process characteristics and comparison with single-feed methods

Syed, W. U. H. and Pinkerton, A. J. and Li, L. (2006) Simultaneous wire- and powder-feed direct metal deposition: An investigation of the process characteristics and comparison with single-feed methods. Journal of laser applications, 18 (1). pp. 65-72. ISSN 1042-346X

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Abstract

Many direct laser deposition processes utilize metallic powders to obtain near net shape objects. Wire feeding has also been used in many laser-cladding and other material-addition applications. Each feeding method has its own advantages and disadvantages: wire feeding laser deposition typically has higher deposition rate and higher material usage rate than the powder feeding deposition process, while powder feeding gives better geometry control. In this study a new approach is investigated by combining wire and powder feeding to achieve higher build rate and higher material usage efficiency while maintaining the geometry accuracy. Multilayer parts are produced from 316L stainless steel by powder feeding, wire feeding, and the combined process, together with a diode laser at powers of between 1 and 1.5 kW. The tracks are compared and the results analyzed in terms of deposition efficiency, surface roughness, and microstructure. Results show that by combining wire and powder an increased overall deposition rate can be achieved. Sample surface roughness is increased, but remains constant for all the calculated parameters, and microstructure remains essentially the same for all three deposition methods. The differences between the processes and reasons for the final sample characteristics are discussed. (c) 2006 Laser Institute of America.

Item Type: Article
Journal or Publication Title: Journal of laser applications
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Departments: Faculty of Science and Technology > Engineering
ID Code: 59525
Deposited By: ep_importer_pure
Deposited On: 08 Nov 2012 11:34
Refereed?: Yes
Published?: Published
Last Modified: 10 Apr 2014 00:16
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/59525

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