Laser diode area melting for high speed additive manufacturing of metallic components

Zavala-Arredondo, M., Boone, N., Willmott, J., Childs, D. T.D., Ivanov, P., Groom, K. M. and Mumtaz, K. (2017) Laser diode area melting for high speed additive manufacturing of metallic components. Materials and Design, 117, pp. 305-315. (doi:10.1016/j.matdes.2016.12.095)

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Abstract

Additive manufacturing processes have been developed to a stage where they can now be routinely used to manufacture net-shape high-value components. Selective Laser Melting (SLM) comprises of either a single or multiple deflected high energy fibre laser source(s) to raster scan, melt and fuse layers of metallic powdered feedstock. However this deflected laser raster scanning methodology is high cost, energy inefficient and encounters significant limitations on output productivity due to the rate of feedstock melting. This work details the development of a new additive manufacturing process known as Diode Area Melting (DAM). This process utilises customised architectural arrays of low power laser diode emitters for high speed parallel processing of metallic feedstock. Individually addressable diode emitters are used to selectively melt feedstock from a pre-laid powder bed. The laser diodes operate at shorter laser wavelengths (808 nm) than conventional SLM fibre lasers (1064 nm) theoretically enabling more efficient energy absorption for specific materials. The melting capabilities of the DAM process were tested for low melting point eutectic BiZn2.7 elemental powders and higher temperature pre-alloyed 17-4 stainless steel powder. The process was shown to be capable of fabricating controllable geometric features with evidence of complete melting and fusion between multiple powder layers.

Item Type:Articles
Additional Information:
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& Physical Sciences Research Council (EP/K503812/1) IIKE Proof of Concept award.
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Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Ivanov, Dr Pavlo and Childs, Dr David
Authors: Zavala-Arredondo, M., Boone, N., Willmott, J., Childs, D. T.D., Ivanov, P., Groom, K. M., and Mumtaz, K.
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
Journal Name:Materials and Design
Publisher:Elsevier
ISSN:0261-3069
ISSN (Online):0264-1275
Published Online:03 January 2017
Copyright Holders:Copyright © 2017 The Authors
First Published:First published in Materials and Design 117: 305-315
Publisher Policy:Reproduced under a Creative Commons License

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