先進金属基複合材料SiC_<CVD>/Ti-15-3のクリープ

概要

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Creep tests of a continuous fiber-reinforced metal matrix composite SiC_<CVD>/Ti-15-3, which is one of the advanced metal matrix composites, are performed for three fiber directions 0°, 45°and 90° at 450℃. Specimens are chucked inside a furnace to realize a uniform temperature field in the gage section, and elongation in creep is measured. We find the following : ( 1 ) Creep deformation and rupture can occur even in longitudinal creep at a stress level much lower than the tensile strength, although the SiC_<CVD> fiber itself does not creep at all. ( 2 ) This creep behavior is explained partly if we consider the stress relaxation in the matrix material during longitudinal creep tests of the composite. ( 3 ) Off-axis creep of 45°has some ductility, which is greater under lower stress.
社団法人日本機械学会の論文
1993-01-25