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Open AccessArticle

Experimental Study of Thermomechanical Processes: Laser Welding and Melting of a Powder Bed

University of Lyon, ENISE, LTDS UMR 5513 CNRS, 58 rue Jean Parot, 42023 Saint-Etienne CEDEX 02, France
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Crystals 2020, 10(4), 246; https://doi.org/10.3390/cryst10040246
Received: 4 March 2020 / Revised: 22 March 2020 / Accepted: 23 March 2020 / Published: 26 March 2020
(This article belongs to the Special Issue Additive Manufacturing (AM) of Metallic Alloys)
In this study, an experimental approach was developed to analyze and better understand the laser welding and melting of a powder bed process. Different optical diagnostics tools (high-speed camera, infrared camera, pyrometer, etc.) were applied to measure different physical quantities (molten pool morphology, temperature field, residual stresses, and distortions). As a result, measurements during the laser welding process facilitated the building of a database of experimental results (experimental benchmarks). The study of the melting of a powder bed enabled a better understanding of the physics related to the formation and behavior of the molten pool. These results can be used by researchers to improve and validate numerical simulations of these processes. View Full-Text
Keywords: melting of a powder bed; laser welding; optical diagnostics; molten pool; temperature field; residual stresses melting of a powder bed; laser welding; optical diagnostics; molten pool; temperature field; residual stresses
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Saadlaoui, Y.; Sijobert, J.; Doubenskaia, M.; Bertrand, P.; Feulvarch, E.; Bergheau, J.-M. Experimental Study of Thermomechanical Processes: Laser Welding and Melting of a Powder Bed. Crystals 2020, 10, 246.

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