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

被引：5
作者：
de Gouveia, Guilherme Lisboa [1 ]
Garcia, Amauri [2 ]
Spinelli, Jose Eduardo [1 ,3 ]
机构：
[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
来源：
MATERIALS LETTERS | 2021年 / 299卷
基金：
巴西圣保罗研究基金会;
关键词：
Mg alloys; Mg-Si-Zn; Mg2Si; Solidification; Morphology; Tensile properties; MG; MICROSTRUCTURE; BEHAVIOR;
D O I：
10.1016/j.matlet.2021.130084
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
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.
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页数：4
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