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Proceedings Paper

Development of 3D functionally graded models by laser-assisted coaxial powder injection
Author(s): Artem Yakovlev; Ph. Bertrand; Igor Yu. Smurov
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Paper Abstract

Relatively new method of producing 3D objects with Functionally Graded Material (FGM) structure is realized by coaxial powder injection with variable composition into the zone of laser beam action. The desired 3-dimensional material distribution is realized by repetitive deposition process. Theoretical analysis and experimental results show essential role of radiation mode and powder granularity as optimization parameters. Applied laser sources are continuous wave Nd:YAG(HAAS 2006D, 2kW), pulse-periodic Nd:YAG(HAAS HL304P, avg. power 300 W), quazi-cw CO2 (Rofin-Sinar, 300 W). Among applied materials are nanostructured WC/Co, CuSn, Stainless steel 316L, 430L, Co-base alloy, nanostructured FeCu, etc. The originality of obtained results is that different gradient types are produced "in situ" and combined within one sample: smooth, sharp or multilayered gradients. The number of samples is produced and examined with metallographical and SEM analysis. The minimal spatial gradient resolution (transition zone between two different materials) is starting from 10 microns and can be varied in a wide range; the surface roughness depends from powder granularity, best value of Ra is about 5 μm, microhardness of differet zones of samples is varied from 120 to 450 HV. The achieved geometry spatial resolution is 200 μm.

Paper Details

Date Published: 2 April 2004
PDF: 8 pages
Proc. SPIE 5399, Laser-Assisted Micro- and Nanotechnologies 2003, (2 April 2004); doi: 10.1117/12.552851
Show Author Affiliations
Artem Yakovlev, Ecole Nationale d'Ingenieurs de Saint-Etienne (France)
Ph. Bertrand, Ecole Nationale d'Ingenieurs de Saint-Etienne (France)
Igor Yu. Smurov, Ecole Nationale d'Ingenieurs de Saint-Etienne (France)

Published in SPIE Proceedings Vol. 5399:
Laser-Assisted Micro- and Nanotechnologies 2003
Vadim P. Veiko, Editor(s)

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