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Erschienen in: Lasers in Manufacturing and Materials Processing 1/2023

24.11.2022

Laser-Based Directed Energy Deposition (L-DED) Processing of Water Atomized 42CrMo4 Powder

verfasst von: G. A. W. Sweet, I. W. Donaldson, C. T. Schade, D. P. Bishop

Erschienen in: Lasers in Manufacturing and Materials Processing | Ausgabe 1/2023

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Abstract

This study investigates the viability of utilizing a low-cost steel feedstock powder in the context of laser-based directed energy deposition (DED) processing. Here, water atomized 42CrMo4 (comparable to 4140) ferrous powder was deposited on a AISI 4140 substrate using an Optomec MTS 500-AM controlled atmosphere DED system. A statistical design of experiments (DOE) approach was used to parametrically model the effects of laser power, laser scan speed, hatch spacing, layer thickness and powder feed rate on the density of the deposited product. The direct impact of these variables was assessed as well as their respective interactions. The resultant model was found to be highly significant and maintained a capacity to predict future results. It was then leveraged to identify a set of deposition parameters that produced high quality deposits with near full theoretical density. The effects of pre and post-build heat treatments on the microstructure, microhardness, and residual stress of L-DED deposits were assessed as well.

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Literatur
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Zurück zum Zitat Park, J.S., Park, J.H., Lee, M.G., Sung, J.H., Cha, K.J., Kim, D.H.: Effect of Energy Input on the Characteristic of AISI H13 and D2 Tool Steels Deposited by a Directed Energy Deposition Process. Metall. Mater. Trans. A Phys. Metall. Mater. Sci. 47, 2529–2535 (2016). https://doi.org/10.1007/s11661-016-3427-5CrossRef Park, J.S., Park, J.H., Lee, M.G., Sung, J.H., Cha, K.J., Kim, D.H.: Effect of Energy Input on the Characteristic of AISI H13 and D2 Tool Steels Deposited by a Directed Energy Deposition Process. Metall. Mater. Trans. A Phys. Metall. Mater. Sci. 47, 2529–2535 (2016). https://​doi.​org/​10.​1007/​s11661-016-3427-5CrossRef
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Metadaten
Titel
Laser-Based Directed Energy Deposition (L-DED) Processing of Water Atomized 42CrMo4 Powder
verfasst von
G. A. W. Sweet
I. W. Donaldson
C. T. Schade
D. P. Bishop
Publikationsdatum
24.11.2022
Verlag
Springer US
Erschienen in
Lasers in Manufacturing and Materials Processing / Ausgabe 1/2023
Print ISSN: 2196-7229
Elektronische ISSN: 2196-7237
DOI
https://doi.org/10.1007/s40516-022-00196-0

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