LARGE-DIMENSION METAL PARTS PRODUCED THOUGH LASER POWDER BED FUSION

1 P.M. PRAGANA João
Co-authors:
1 POMBINHA Pedro 2 DUARTE Valdemar R. 2 RODRIGUES Tiago A. 2 OLIVEIRA João P. 2 SANTOS Telmo G. 2 MIRANDA Rosa M. 1 COUTINHO Luísa 1 M.A. SILVA Carlos
Institutions:
1 IDMEC, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, Portugal, EU, pedro.d.oliveira.pombinha@ist.utl.pt
2 UNIDEMI, NOVA School of Science and Technology, NOVA University Lisbon, Portugal
Conference:
28th International Conference on Metallurgy and Materials, Hotel Voronez I, Brno, Czech Republic, EU, May 22nd - 24th 2019
Proceedings:
Proceedings 28th International Conference on Metallurgy and Materials
Pages:
610-615
ISBN:
978-80-87294-92-5
ISSN:
2694-9296
Published:
4th November 2019
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
46 views / 14 downloads
Abstract

Laser Powder Bed Fusion (LPBF) is an Additive Manufacturing technology in which a defined metal powder thickness is selectively melted with a laser, according to the geometry of the part being produced. The layer-by-layer approach allows manufacturing functional complex shaped components, with high structural integrity at low cost. This technique has been proven to produce near net-shape parts up to 99% relative density and has viable economic benefits. However, the typical build envelope for this type of machines is of 300x350x250 mm, thus the manufacturing of large-dimension parts is unachievable.The goal of this project was to develop a customized LPBF machine with a build envelope of 1020 mm x 1020 mm x 520 mm that is able to produce high quality parts. Through fine-tuning of the processing parameters, the machine has produced samples with 316L stainless steel which exhibit relative densities above 99%. Besides the samples, the machine has also successfully built large-dimension parts. The results obtained are a positive indicator towards the ultimate goal of zero-defect manufacturing.

Keywords: Additive manufacturing, LPBF, density, large-dimension parts, 316L SS
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