| Texto completo | |
| Autor(es): |
Torres, Luis Vanderlei
;
Torres, Luis Fernando
;
Zoqui, Eugenio Jose
Número total de Autores: 3
|
| Tipo de documento: | Artigo Científico |
| Fonte: | ADVANCES IN MATERIALS SCIENCE AND ENGINEERING; v. 2016, p. 7-pg., 2016-01-01. |
| Resumo | |
This work evaluates themorphological evolution at the semisolid state of the Al-4.0wt% Si-2.5wt% Cu alloy produced by direct chill casting under electromagnetic stirring (EMS) and by one equal channel angular pressing (ECAP) pass. The ECAP emerged as a promising technique capable of reduction and homogeneous metals microstructure imposing large deformations occurs in amatrix that contains two channels of the same cross-sectional area and forms an angle of 120 degrees. The materials were submitted to reheating treatment in condition of 60% solid fraction at treatment times of 0, 30, and 90 s. Comparing the two cases, we have the presented ECAP process that had an excellent response to the recovery and recrystallization mechanisms, and refined microstructures ideal for thixoforming were produced. Primary particle sizes of about 15 mu m and grain sizes of about 75 mu m and a circularity shape factor of more than 0.60 were obtained. The low silicon alloy, Al-4.0wt% Si-2.5wt% Cu, presented excellent refinement when processed via equal channel angular pressing, presenting good morphological stability at the semisolid state, without significant changes in size or shape of the solid particles. This fully globular structure is favourable for thixoforming processes. (AU) | |
| Processo FAPESP: | 13/09961-3 - Modernização do Laboratório de Fundição e Tixoconformação da FEM/UNICAMP |
| Beneficiário: | Eugênio José Zoqui |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |
| Processo FAPESP: | 15/22143-3 - Resistência à fadiga de ligas metálicas tixoconformadas |
| Beneficiário: | Eugênio José Zoqui |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |
| Processo FAPESP: | 09/08478-1 - Lingotamento e Tixoconformação de Novas Ligas Al-Si-Cu-Mg |
| Beneficiário: | Luis Vanderlei Torres |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado |