Eventos Anais de eventos
COBEM 2021
26th International Congress of Mechanical Engineering
DEFECTS IN WIRE AND ARC ADDITIVE MANUFACTURED COMPONENTS: A REVIEW
Submission Author:
André Luiz Brito Novelino , DF , Brazil
Co-Authors:
André Luiz Brito Novelino, Maksym Ziberov
Presenter: André Luiz Brito Novelino
doi://10.26678/ABCM.COBEM2021.COB2021-0626
Abstract
As a potential process for industry, the Wire and Arc Additive Manufacturing process has been probed for implementation in factory lines, once it has high deposition rates, material economy, feasible equipment and it can manufacture large and complex components. However, this process can present various defects if wrong parameters were used, causing high porosity, deformation, cracks and fractures, delamination, residual stress, and oxidation. Therefore, industrial companies and academic institutions has been studying these defects and its causes, to develop new methods to solve them and achieve higher quality in additive manufacturing parts. This article reviews the common defects found, for different materials deposited by different Wire Arc Additive Manufacturing processes, such as CMT-GMAW, GTAW, PAW and hybrid Laser processes. The main causes for each type of defect are presented followed by the methods that can be applied for solving them. Computer assisted simulations, its role in parameters optimization and its uses as forecasting defects method are also addressed. It was possible to notice that they can obtain good predictions for microstructure result, work temperature and which heat treatment can be done to solve problems with residual stress and cracks. Porosity and deformation can also be controlled with process technologies, as CMT-GMAW.
Keywords
waam, Defects, Parameters Optimization, Quality improvement, Inspection methods
