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:
Journal Article
Journal or Publication Title:
Journal of Laser Applications
Uncontrolled Keywords:
/dk/atira/pure/researchoutput/libraryofcongress/ta
Subjects:
ID Code:
59540
Deposited By:
Deposited On:
21 Nov 2012 09:16
Refereed?:
Yes
Published?:
Published
Last Modified:
01 Jan 2020 08:11