Towards a morphological control of Mg2Si and superior tensile properties of high-Zn Mg-0.6Si (-Zn) alloys

Autor(es)

de Gouveia, Guilherme Lisboa ^[1] ; Garcia, Amauri ^[2] ; Spinelli, Jose Eduardo ^{[3, 1]}

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Carlos, Grad Program Mat Sci & Engn, BR-13565905 Sao Carlos, SP - Brazil

^[2] Univ Estadual Campinas, Dept Mfg & Mat Engn, BR-13083860 Campinas, SP - Brazil

^[3] Univ Fed Sao Carlos, UFSCar, Dept Mat Engn, BR-13565905 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Materials Letters; v. 299, SEP 15 2021.
• Citações Web of Science: 0

Resumo

In this study it was found that Mg-0.6Si-Zn alloys with a high Zinc (Zn) content (>2 wt%) can generate fine fibrous Mg2Si particles, as long as the solidification cooling rates could be supervised. Due to the solubility of Zn in Mg and the morphology of Mg2Si fibers, improved tensile properties were obtained for samples having refined dendritic arrangements. These results open the perspective of development of Mg-Si alloys with higher Zn contents, with greater strength and ductility due to microstructural control. Although there is a considerable difference in Zn alloying between them, both the Mg-0.6wt.%Si-2.0wt. %Zn and Mg-0.6wt.%Si-3.0wt.%Zn alloys have reached quite close optimum levels of tensile properties of the order of 200 MPa and 9%. (C) 2021 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 19/23673-7 - Avaliação de ligas para juntas térmicas e para manufatura aditiva
• Beneficiário: José Eduardo Spinelli
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 19/22163-5 - Microestruturas, morfologias e resistência mecânica da liga eutética Mg-1.4%Si
• Beneficiário: Felipe Escher Saldanha
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica
• Processo FAPESP: 19/01432-8 - Desenvolvimento microestrutural, resistências mecânica e à corrosão de ligas Mg-Si e Mg-Si-(X) para aplicações biomédicas
• Beneficiário: Guilherme Lisboa de Gouveia
• Modalidade de apoio: Bolsas no Brasil - Doutorado