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Process characteristics and effects of gas- and water-atomized stainless steel powders in laser-based rapid tooling

Pinkerton, A. J. and Li, L. (2003) Process characteristics and effects of gas- and water-atomized stainless steel powders in laser-based rapid tooling. Journal of laser applications, 15 (3). pp. 172-178. ISSN 1042-346X

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Abstract

In rapid tooling using the direct laser deposition process and stainless steel materials, only powders prepared using the gas-atomization method have been used because of their presumed superior flow characteristics. In this article, the use of water-atomized powder is investigated by comparing the behavior of the two types of 316 L powders, deposited using a CO2 laser and coaxial head. Results show little difference in the pneumatic conveyance of the powders, but considerably greater absorption of laser energy by the water-atomized powder between the nozzle and material deposition point. Walls produced using the water-atomized powder exhibited a more textured microstructure and smoother sidewall surfaces, with less surface metallic oxides, but the deposition rate was considerably lower than when using gas-atomized powder. (C) 2003 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: 59540
Deposited By: ep_importer_pure
Deposited On: 21 Nov 2012 09:16
Refereed?: Yes
Published?: Published
Last Modified: 10 Apr 2014 00:17
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/59540

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