NDLI: Fabrication and characterization of cast magnesium matrix composites by vacuum stir casting process

Content Provider	Springer Nature Link
Author	Gui, Manchang Li, Peiyong Han, Jianmin
Copyright Year	2003
Abstract	A vacuum stir casting process is developed to produce SiC$_{p}$ reinforced cast magnesium matrix composites. This process can eliminate the entrapment of external gas onto melt and oxidation of magnesium during stirring synthesis. Two composites with Mg-Al9Zn and Mg-Zn5Zr alloys as matrices and 15 vol.% SiC particles as reinforcement are obtained. The microstructure and mechanical properties of the composites and the unreinforced alloys in as-cast and heat treatment conditions are analyzed and evaluated. In 15 vol.% SiC$_{p}$ reinforced Mg-Al9Zn alloy-based composite (Mg-Al9Zn/15SiC$_{p}$), SiC particles distribute homogenously in the matrix and are well bonded with magnesium. In 15 vol.% SiC$_{p}$ reinforced Mg-Zn5Zr alloy-based composite (Mg-Zn5Zr/15SiC$_{p}$), some agglomerations of SiC particles can be seen in the microstructure. In the same stirring process conditions, SiC reinforcement is more easily wetted by magnesium in the Mg-Al9Zn melt than in the Mg-Zn5Zr melt. The significant improvement in yield strength and elastic modulus for two composites has been achieved, especially for the Mg-Al9Zn/15SiC$_{p}$ composite in which yield strength and elastic modulus increase 112 and 33%, respectively, over the unreinforced alloy, and increase 24 and 21%, respectively, for the Mg-Zn5Zr/15SiC$_{p}$ composite. The strain-hardening behaviors of the two composites and their matrix alloys were analyzed based on the microstructure characteristics of the materials.
Starting Page	128
Ending Page	134
Page Count	7
File Format	PDF
ISSN	10599495
Journal	Journal of Materials Engineering and Performance
Volume Number	12
Issue Number	2
e-ISSN	15441024
Language	English
Publisher	Springer-Verlag
Publisher Date	2003-01-01
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	composite materials magnesium alloy microstructure stir casting process tensile properties Characterization and Evaluation of Materials Materials Science Tribology, Corrosion and Coatings Quality Control, Reliability, Safety and Risk Engineering Design
Content Type	Text
Resource Type	Article
Subject	Mechanics of Materials Materials Science Mechanical Engineering

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