The effect of thermal cycling on the mechanical properties of sic whisker reinforced magnesium alloy-based composites |
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Authors: | Si-Young Chang Akihiko Kamio |
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Affiliation: | (1) Department of Metallurgical Engineering, Faculty of Engineering, Tokyo Institute of Technology, 152 Tokyo, Japan |
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Abstract: | The effect of thermal cyclings on mechanical properties at room and some elevated temperatures of SiC whisker-reinforced magnesium-matrix
composites produced by squeeze casting and hot extrusion are clarified. Subsequent thermal cycling produces internal stress
at the matrix/SiC whisker interfaces causing fatigue. The mechanical properties of composites are more influenced by the low
thermal cycling of 298 K— 77 K than the high thermal cycling 673 K—298 K. The high thermal cycling of 673 K—298 K has only
a slight affect on such mechanical properties as tensile strength and proof stress at temperatures lower than 473 K. However,
at 473 K and 573 K, the thermal cyclings there almost no influence on the mechanical properties of SiC whisker reinforced
AE42 alloy-matrix composites. |
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Keywords: | magnesium-matrix composite squeeze casting hot extrusion thermal cycling mechanical properties |
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