RT info:eu-repo/semantics/article
T1 Impact of the laser scanning strategy on the quality of 17-4PH stainless steel parts manufactured by selective laser melting
A1 Giganto Fernández, Sara
A1 Martínez Pellitero, Susana
A1 Barreiro García, Joaquín
A1 Leo, Paola
A1 Castro Sastre, María Ángeles
A2 Ingenieria de los Procesos de Fabricacion
K1 Ingeniería mecánica
K1 17-4PH stainless steel
K1 Additive manufacturing (AM)
K1 Laser scanning strategy
K1 Mechanical properties
K1 Porosity
K1 Selective laser melting (SLM)
K1 3316 Tecnología de Productos Metálicos
AB [EN] A significant correlation between scanning strategies and the quality of parts manufactured additively with Selective Laser Melting (SLM) technology is shown. Therefore, a in deep study of the influence of scanning strategy is of great value for the manufacturing process in order to promote SLM technology in applications with high service requirements. In particular, this research is carried out on 17-4PH stainless steel parts, which is an alloy widely used in sectors such as aerospace or automotive for its excellent mechanical properties. This research proposes to evaluate the properties of 17-4PH parts manufactured using three usual scanning strategies (normal, concentric and hexagonal) in order to optimize the SLM process depending on the final part application. According to the obtained results, the following general conclusions have been drawn. Hexagonal strategy can be considered the most appropriate in terms of porosity. Both hexagonal and normal strategy have good mechanical properties, as well as geometrical and dimensional quality. Regarding surface finish of top face (where the used scanning pattern is visible), normal strategy is the most appropriate. In general, concentric strategy presents different results from the others: larger and irregular pores, ductile tensile behaviour, low roughness on lateral faces, and high geometrical errors in samples with large scanning vectors. As a future work, it is proposed to manufacture SLM parts combining these strategies in order to improve their properties. In addition, it is proposed to evaluate the influence of different post-process operations on the quality of parts printed by SLM using different strategies.
PB ELSEVIER
SN 2238-7854
LK https://hdl.handle.net/10612/17819
UL https://hdl.handle.net/10612/17819
NO Giganto, S., Martínez-Pellitero, S., Barreiro, J., Leo, P. & Castro-Sastre, M. A. (2022). Impact of the laser scanning strategy on the quality of 17-4PH stainless steel parts manufactured by selective laser melting. Journal of Materials Research and Technology, 20, 2734–2747. https://doi.org/10.1016/j.jmrt.2022.08.040
DS BULERIA. Repositorio Institucional de la Universidad de León
RD 19-may-2024