| Autor(es): |
Nunez, Johan Grass
;
Pereira, Juan I.
;
Rodrigues, Alessandro
;
Coelho, Reginaldo T.
Número total de Autores: 4
|
| Tipo de documento: | Artigo Científico |
| Fonte: | PROCEEDINGS OF ASME 2024 INTERNATIONAL MECHANICAL ENGINEERING CONGRESS AND EXPOSITION, IMECE2024, VOL 2; v. N/A, p. 10-pg., 2024-01-01. |
| Resumo | |
Laser Powder - Directed Energy Deposition (LP-DED) is an Additive Manufacturing (AM) technology that uses metal powder to create structures and repair worn components. Many published works have explored the operational parameters, such as laser power (P), mass flow rate ((m)over dot) and travel speed (V-f), relating them with the resultant mechanical properties. Increasingly, studies have extended into material selection and modifications of it. The LP-DED process can have some notable applications in mold repair using AISI H13 steel and previous investigations have assessed heat treatments and microstructural characteristics when building and post- processing those repairs. However, the aspect of different substrate surface conditions remains unexplored. This research examines the effects of surface conditions on deposition outcomes using AISI H13 steel for substrate and deposition material. Substrate surface machined, sand blasted and polished before deposition. SEM was used to analyze the cross-section and determine how surface quality influences the bead integrity. The results reveal that as machined surfaces show a dilution variability of 28% on the same bead, while as blasted surface provide more stable bead areas. Additionally, the Heat-Affected Zone (HAZ) in the polished surface deposition was 18% smaller than observed in as machined surface. The study further includes evaluations of depositions area, dilution percentages, and micro-hardness, offering insights into the optimal substrate conditions for L-DED applications. (AU) | |
| Processo FAPESP: | 20/06984-6 - Desenvolvimento da cadeia de produção de produção de componentes metálicos por manufatura aditiva |
| Beneficiário: | Mário Boccalini Júnior |
| Modalidade de apoio: | Auxílio à Pesquisa - Núcleos de Pesquisa Orientada a Problemas em São Paulo |