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An experimental and theoretical investigation of combined gas- and water-atomized powder deposition with a diode laser

Pinkerton, A J and Syed, W U H and Li, L (2006) An experimental and theoretical investigation of combined gas- and water-atomized powder deposition with a diode laser. Journal of laser applications, 18 (1). pp. 73-80. ISSN 1042-346X

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Abstract

Functionally graded or composite components (FGCs) have been recognized as having immense potential for many industries. So far, deposition of compositionally graded alloys is the only method that has been shown to be a practical way to produce FGCs. In this work, a second way, that allows graded structures of a single material to be formed by direct metal deposition, is investigated. Simple component samples are built using a diode laser direct metal deposition system with a side feed nozzle and blends of water- and gas-atomized 316L steel powder in varying proportions. Trends in surface finish, wall integrity, and overall wall dimensions are immediately apparent. Further analyses using optical microscopy, x-ray diffraction, and mechanical testing methods show that it is possible to produce differences in physical properties such as tensile strength and hardness across a formed component. The system is modeled and the results discussed in terms of the thermal cycle of the build material. (c) 2006 Laser Institute of America.

Item Type: Article
Journal or Publication Title: Journal of laser applications
Uncontrolled Keywords: laser deposition ; spraying ; semiconductor lasers ; composite materials ; stainless steel ; surface finishing ; optical testing ; X-ray diffraction ; mechanical testing ; diode laser ; gas atomized ; water atomized ; clad properties
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Departments: Faculty of Science and Technology > Engineering
ID Code: 59527
Deposited By: ep_importer_pure
Deposited On: 30 Oct 2012 18:21
Refereed?: Yes
Published?: Published
Last Modified: 10 Apr 2014 00:16
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/59527

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