Selective laser melting of Cu-inconel 718 powder mixtures. (November 2020)

• Record Type: Journal Article
• Authors: Hassanin, Andrea El; Scherillo, Fabio; Prisco, Umberto; Sansone, Raffaele; Astarita, Antonello
• Is Part Of: Journal of manufacturing processes. Volume 59(2020)
• Page Start: 679
• Page End: 689
• Publication Date: 2020-11
• Subjects: Inconel 718 -- Copper -- Selective laser melting -- Porosity -- Thermal conductivity -- Energy input; Production management -- Data processing -- Periodicals; Manufacturing processes -- Periodicals; Procestechnologie; Productietechniek; Production -- Gestion -- Informatique -- Périodiques; Fabrication -- Périodiques; Manufacturing processes; Production management -- Data processing; Periodicals; 670.5
• DOI: 10.1016/j.jmapro.2020.10.039
• Languages: English
• ISSNs: 1526-6125

Abstract

Highlights: Cu mixed with Inconel 718 power hinders the densification process during SLM. Compared to pure Inconel 718, on increasing the Cu content in the feedstock powder it is observed. A growing reduction of the molten pool width. An intensifying frequency of lack-of-fusion defects resulting in a larger porosity. A progressively larger loss of hardness. Abstract: The selective laser melting of mechanically mixed Inconel 718 and copper powders is studied by processing feedstocks of different Cu content at various energy inputs. It was observed that with the increase of the Cu content the width of the molten pools decreases while the porosity of the samples increases. Lower values of energy input enhance the effects brought about by the addition of Cu. Decreasing the Cu weight fraction or, inversely, increasing the energy input, the tensile and yield strengths progressively increase due both to the reduced content of the softer component, such as the Cu powder, and to the decrease in porosity. Because of the porosity increase, the decrease in hardness and increase in thermal conductivity, registered on incrementing the copper content in the feedstock, are, respectively, greater and lower than expected. The obtained results show the possibility of manufacturing dense part by SLM using Cu-Inconel 718 mixed powders.