Per: naiara vieira le sénéchal (Instituto Militar de Engenharia), Danilo Abílio Corrêa Gonçalves (INSTITUTO MILITAR DE ENGENHARIA), Rodolfo da Silva Teixeira (INSTITUTO MILITAR DE ENGENHARIA), Rebeca Vieira de Oliveira (INSTITUTO MILITAR DE ENGENHARIA), Andersan dos Santos dos Santos Paula (INSTITUTO MILITAR DE ENGENHARIA), Daniel Leal Bayerlein (Grupo Combustol Metalpó), Getúlio de Vasconcelos (Instituto de Estudos Avançados (IeaV))
Abstract:
The additive manufacturing (AM) process is a technique that enables integrated device production and is applicable in various industrial fields. Furthermore, the shape memory NiTi alloy parts and components production in this process presents attractive processing options, challenging conventional manufacturing routes, particularly with regard to the Directed Energy Deposition (DED) method. However, the physical and chemical characteristics of the powder used as raw material have a significant impact on the fusion and interaction with the laser or plasma beam, which ultimately influences the final properties of the manufactured material. Therefore, this study aims to investigate the characteristics of Ni oxirreduced and Ti HDH (hidrated-dehidrated) powders, such as particle size, particle distribution, chemical composition and structural characteristics, through Scanning Electron Microscopy, Feret circularity and aspect ratio, X-ray Fluorescence, and X-ray Diffraction analyses, in order to conduct future work to criticize the use of these individually and in an equiatomic mixture, and process parameters adjustments to make them compatible with the DED method.