Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
Effect of laser powder bed fusion processing parameters on densification behavior and microhardness of Inconel 625/NbC composites
Submission Author:
Amanda Lemos , SC
Co-Authors:
Amanda Lemos, Guilherme Volpato, Erick Cardoso Costa, Fabio Antonio Xavier, Milton Pereira, Marcio C. Fredel
Presenter: Marcio C. Fredel
doi://10.26678/ABCM.COBEM2023.COB2023-1600
Abstract
Nickel-based superalloys, such as Inconel 625, are suitable materials for aerospace applications requiring high-temperature resistance. Even though promising, among the other materials involved in aerospace engineering, nickel-based superalloys have a relative high density, which induces creep damage in associated materials. Adding a ceramic reinforcement as a second phase in a metal matrix, can reduce this damage by minimizing the material density and absorbing part of the load suffered. Niobium carbide (NbC) is a favorable variety of reinforcement due to high strength and limited researched in the literature, considering the inferior niobium availability in foreign countries. Laser powder bed fusion (L-PBF) is one of the advanced additive manufacturing technologies developed for building components by adding melting powder layer by layer, obtaining higher density pieces and reduced requirement of post processing treatments. Previous works, approach L-PBF as a promising method for production of metal matrix composites especially in complex geometry forms, considering the wide range of versality, high production rate and accuracy at lowest costs. However, the set of laser powder bed fusion parameters influences defect formation and density of structures, requiring a strategic combination to generate suitable components. In this context, reinforced composites were produced with the L-PBF process for further microstructural characterization and evaluation of the distribution of reinforcement particles. The objective of this study is to investigate the effects of laser powder bed fusion processing parameters on densification behavior and microhardness of Inconel 625 composites reinforced with (10%wt.) NbC particles. The factors laser power and scanning speed where variable, while the layer thickness, hatch spacing and scanning strategy were maintained the same in all samples. The building composites have shown promising results and advantages of the laser powder bed fusion technique, with potential route for aerospace components development. Nevertheless, samples with relative high density and microhardness were produced through the selection of suitable values for laser powder and scanning speed.
Keywords
Laser powder bed fusion, metal matrix composite, Microhardness, Inconel 625, Densification
