3236 局所的にセラミック粒子で強化された金属の疲労強度に及ぼす端部応力場の影響(J07-2 締結・接合の力学とプロセス(2),J07 締結・接合の力学とプロセス)

概要

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To contribute to a better understanding of the fracture mechanisms, stress distributions and cyclic fatigue fracture behavior of an aluminum cast alloy locally reinforced by SiC particles and Al_2O_3 whiskers a four-point bending test was precisely analyzed experimentally. Aluminum cast alloy locally reinforced by SiC particles and Al_2O_3 whiskers was cyclically deformed to failure at room temperature under stress-amplitude controlled condition. The fracture mechanism and the fracture path has been investigated on the fracture surfaces. Crack initiation locations and fracture surface morphologies have also been investigated. SEM analysis of the fracture surface showed that the fatigue fracture was controlled by fracture of reinforcing particles and whiskers.
2006-09-15