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Effect of pressure on the solidification behavior and mechanical properties of SiCp/Al-Mg composites
H. W. Zhang; L. Geng; G. H. Fan; Y. Sun
2013
Source PublicationJournal of Wuhan University of Technology-Materials Science Edition
ISSN1000-2413
Volume28Issue:2Pages:274-278
AbstractSiCp/Al-Mg metal matrix composites were manufactured by semi-solid stirring technique. The composites were remelted and then solidified under different pressures to study the solidification behavior of composites by differential thermal analysis, scanning electron microscopy, and transmission electron microscopy. The experimental results show that SiCp reinforcements can not act as heterogeneous nucleation sites for alpha(Al), and an interfacial layer composed of MgAl2O4 spinel and Si-rich phase existed at Al/SiCp interface. The undercooling of the matrix alloy was improved by the pressure applied, resulting in the grain of matrix alloy refining. The X-ray diffraction pattern of composites testified that the matrix alloy exhibited a certain preferred orientation during solidification. In addition, with increasing the pressure for solidification, the pored defects in the composites decreased, while the relative density, hardness and compressive strength increased. Therefore, the microstructure and mechanical properties of the composites were improved by pressure placed during the solidification of SiCp/Al-Mg composites.
description.department[zhang hongwei ; geng lin ; fan guohua] harbin inst technol, sch mat sci & engn, harbin 150001, peoples r china. [sun yuan] chinese acad sci, inst met res, shenyang 110016, peoples r china. ; geng, l (reprint author), harbin inst technol, sch mat sci & engn, harbin 150001, peoples r china. ; hongweizhang@imr.ac.cn ; genglin@hit.edu.cn
KeywordMmcs Nucleation Solidification Behavior Microstructure Mechanical Properties Metal-matrix Composites Alloy Nucleation Aluminum Microstructure
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Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/71678
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
H. W. Zhang,L. Geng,G. H. Fan,et al. Effect of pressure on the solidification behavior and mechanical properties of SiCp/Al-Mg composites[J]. Journal of Wuhan University of Technology-Materials Science Edition,2013,28(2):274-278.
APA H. W. Zhang,L. Geng,G. H. Fan,&Y. Sun.(2013).Effect of pressure on the solidification behavior and mechanical properties of SiCp/Al-Mg composites.Journal of Wuhan University of Technology-Materials Science Edition,28(2),274-278.
MLA H. W. Zhang,et al."Effect of pressure on the solidification behavior and mechanical properties of SiCp/Al-Mg composites".Journal of Wuhan University of Technology-Materials Science Edition 28.2(2013):274-278.
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