12,000

We have over 12,000 students, from over 100 countries, within one of the safest campuses in the UK

93%

93% of Lancaster students go into work or further study within six months of graduating

Home > Research > Publications & Outputs > Simultaneous wire- and powder-feed direct metal...
View graph of relations

« Back

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

Research output: Contribution to journalJournal article

Published

Journal publication date02/2006
JournalJournal of laser applications
Journal number1
Volume18
Number of pages8
Pages65-72
Original languageEnglish

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.