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An investigation of the effect of pulse frequency in laser multiple-layer cladding of stainless steel

Pinkerton, A. J. and Li, L. (2003) An investigation of the effect of pulse frequency in laser multiple-layer cladding of stainless steel. Applied surface science, 208-20. pp. 405-410. ISSN 0169-4332

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Abstract

The consolidation of metal powder onto a solid substrate using a laser beam allows fusion of the build material to be realised and fully-dense walls or surfaces, suitable for rapid prototyping and tooling applications, to be fabricated. The final wall geometry and microstructure of metals deposited in this way are determined in part by the pulse frequency of the laser beam used. A 1.2 kW CO2 laser, operating over a range of different pulse frequencies is used to investigate this effect. Microstructural characterisation of multiple layers of consolidated 316L steel revealed a coarser, but less porous austenitic structure when using a pulsed beam. The final hardness of the steel increased with pulse frequency, but was not constant throughout the wall, and the surface roughness varied little.

Item Type: Article
Journal or Publication Title: Applied surface science
Uncontrolled Keywords: Rapid prototyping ; Direct laser deposition ; Laser cladding ; Pulse frequency
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Departments: Faculty of Science and Technology > Engineering
ID Code: 59543
Deposited By: ep_importer_pure
Deposited On: 30 Oct 2012 18:34
Refereed?: Yes
Published?: Published
Last Modified: 24 Jan 2014 05:34
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/59543

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