| Texto completo | |
| Autor(es): |
Soler, Gabriela de Araujo
;
de Faria, Andre Ono
;
Borges, Julia Silva
;
Vida, Talita
;
Souza, Renato Chaves
;
Avila, Julian Arnaldo
;
Brito, Crystopher
Número total de Autores: 7
|
| Tipo de documento: | Artigo Científico |
| Fonte: | METALS; v. 14, n. 10, p. 15-pg., 2024-10-01. |
| Resumo | |
Aluminium alloys have been one of the leading materials used in aircraft structural components due to their mechanical performance, low density, and different manufacturing and inspection techniques. The mechanical, chemical, and electrical properties of metallic alloys relate to the microstructural arrangement, which depends on the alloying elements and manufacturing parameters. Therefore, this study aims to experimentally develop an Al-2wt.%Ni-0.5wt.%Co alloy as an alternative for aerospace applications, evaluating the main metallurgical aspects influencing mechanical strength. The samples were solidified in brass moulds with four different diameters, allowing four different cooling rates. A statistical analysis of the correlation between microstructural parameters and mechanical properties is proposed to optimise the conditions for obtaining the best mechanical strength. A microstructure with an essentially cellular matrix of the alpha-Al phase was observed. The tensile strength limit values (sigma U) of 117 MPa, specific elongation (delta) of 13.8%, and average microhardness of 33 HV were obtained. The Al-2wt.%Ni-0.5wt.%Co alloy exhibits impressive high cycle fatigue performance, with an endurance limit of 91 MPa at 107 cycles, driven by the synergistic effects of Al3Ni for strength and Al9Co2 for enhanced ductility and toughness. (AU) | |
| Processo FAPESP: | 20/09079-2 - Avaliação mecânica e caraterização microestrutural de peças fabricadas por manufatura aditiva, com deposição por energia direcionada, nas ligas de Inconel 625 e 718 com aplicação aeroespacial |
| Beneficiário: | Julian Arnaldo Avila Diaz |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |
| Processo FAPESP: | 22/03633-3 - Avaliação da resistência a corrosão de uma liga Al-Ni-Co |
| Beneficiário: | Gabriela de Araújo Soler |
| Modalidade de apoio: | Bolsas no Brasil - Iniciação Científica |