Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
SURFACE IMPROVEMENT OF AN ADDITIVE MANUFACTURED LAYER THROUGH LASER REMELTING
Submission Author:
Luiz Eduardo dos Santos Paes , MG , Brazil
Co-Authors:
Luiz Eduardo dos Santos Paes, Milton Pereira, Fabio Antonio Xavier, Francisco Ratusznei, Walter Lindolfo Weingaertner, Louriel Vilarinho
Presenter: Luiz Eduardo dos Santos Paes
doi://10.26678/ABCM.COBEM2019.COB2019-2438
Abstract
Before selecting a component for critical applications, is important to assure its integrity. Recently, additive manufacturing has been used for fabrication of medical and aerospace parts, but many issues still not understood, regarding the surface quality and voids. Although post-processing methods are available, aiming at providing integrity, these techniques show limitations. The propose of this work is to analyze the Laser Remelting (LR) as an alternative of post-processing components made by Directed Energy Deposition with Laser (DED-L), a typical additive manufacturing process. Surface images were acquired with the Scanning Electron Microscope (SEM), before and after remelting, and the transversal images of the layer formed by adjacent bead were done with an Optical Microscope (OP). The average roughness (Ra) was measured with a 2D profilometer. The results pointed that LR contributes for eliminating non-melted particles adhered at the surface, which resulted in a 53% reduction of Ra, and also a decrease of lack of fusion area, simultaneously. Therefore, the fatigue strength could be improved.
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