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Open AccessArticle

Laser-Aided Directed Energy Deposition of Steel Powder over Flat Surfaces and Edges

Department of Industrial Engineering, University of Salerno, 84084 Fisciano, Italy
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Materials 2018, 11(3), 435; https://doi.org/10.3390/ma11030435
Received: 30 January 2018 / Revised: 6 March 2018 / Accepted: 13 March 2018 / Published: 16 March 2018
In the framework of Additive Manufacturing of metals, Directed Energy Deposition of steel powder over flat surfaces and edges has been investigated in this paper. The aims are the repair and overhaul of actual, worn-out, high price sensitive metal components. A full-factorial experimental plan has been arranged, the results have been discussed in terms of geometry, microhardness and thermal affection as functions of the main governing parameters, laser power, scanning speed and mass flow rate; dilution and catching efficiency have been evaluated as well to compare quality and effectiveness of the process under conditions of both flat and edge depositions. Convincing results are presented to give grounds for shifting the process to actual applications: namely, no cracks or pores have been found in random cross-sections of the samples in the processing window. Interestingly an effect of the scanning conditions has been proven on the resulting hardness in the fusion zone; therefore, the mechanical characteristics are expected to depend on the processing parameters. View Full-Text
Keywords: Directed Energy Deposition; steel powder; Additive Manufacturing; laser material processing Directed Energy Deposition; steel powder; Additive Manufacturing; laser material processing
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Caiazzo, F.; Alfieri, V. Laser-Aided Directed Energy Deposition of Steel Powder over Flat Surfaces and Edges. Materials 2018, 11, 435.

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