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Combining wire and coaxial powder feeding in laser direct metal deposition for rapid prototyping

Syed, Waheed Ul Haq and Pinkerton, Andrew J. and Li, L. (2006) Combining wire and coaxial powder feeding in laser direct metal deposition for rapid prototyping. Applied surface science, 252 (13). pp. 4803-4808. ISSN 0169-4332

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Abstract

Powder and wire deposition have been used separately in many laser-cladding, rapid prototyping and other additive manufacturing applications. In this paper, a new approach is investigated by simultaneously feeding powder from a coaxial nozzle and wire from an off-axis nozzle into the deposition melt pool. Multilayer parts are built from 316L steel using a 1.5 kW diode laser and different configurations of the powder and wire nozzles are compared in terms of surface roughness, deposition rate, porosity and microstructure. The parts are analysed using scanning electron microscopy (SEM), X-ray diffraction (XRD) and optical microscopy techniques. Results show that deposition efficiency increased and surface roughness decreased with the combined process; some porosity was present in samples produced by this method, but it was 20-30% less than in samples produced by powder alone. Wire injection angles into the melt pool in both horizontal and vertical planes were found to be significant for attaining high deposition efficiency and good surface quality. Reasons for the final sample characteristics and differences between the combined process and the separate powder and wire feeding techniques are discussed. (c) 2005 Elsevier B.V. All rights reserved.

Item Type: Article
Journal or Publication Title: Applied surface science
Additional Information: The final, definitive version of this article has been published in the Journal, Applied Surface Science, 252 (13), 2006, © ELSEVIER.
Uncontrolled Keywords: Coaxial powder feeding ; Wire feeding ; Diode laser ; Direct metal deposition
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Departments: Faculty of Science and Technology > Engineering
ID Code: 59524
Deposited By: ep_importer_pure
Deposited On: 04 Nov 2012 14:58
Refereed?: Yes
Published?: Published
Last Modified: 01 Apr 2014 10:00
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/59524

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