Processing of metal matrix composite by centrifugal casting technique and evaluation of the elastic properties
Mizuno Mamoru; Abe Ken-ichiro; Inoue Tatsuo
Abstract:Metal matrix composite with the functionally gradient properties reinforced by particles are processed by centrifugal casting technique under various casting conditions, and the mechanical properties of the material are evaluated experimentally. In the process, SiC particles are mixed with Al alloy in advance, and they are cast into a mold turning at a given constant velocity. The particles are distributed inhomogeneously into the Al alloy matrix during solidification of the matrix due to the centrifugal force caused by the difference in density between the Al matrix and SiC particle. In order to estimate the functionally gradient properties of the cast composite, the volume fraction of the particle is evaluated from microscopic observation on the cross section, and the Young's modulus is measured by a tension test. As a casting condition, the angular velocity and initial temperature of the mold are changed, and the dependence of distribution of the properties on the casting condition is investigated. Then, the capability of the present casting technique to produce functionally gradient material is discussed. Key Words:centrifugal casting, functionally gradient material, metal matrix composite, volume fraction, Young's modulus, SiC particle, aluminum alloy, tension test