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 1042-346XFull text not available from this repository.
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.
|Journal or Publication Title:||Journal of laser applications|
|Subjects:||T Technology > TA Engineering (General). Civil engineering (General)|
|Departments:||Faculty of Science and Technology > Engineering|
|Deposited On:||08 Nov 2012 11:34|
|Last Modified:||07 Jan 2015 18:00|
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