614 ADC12の疲労寿命に及ぼす巨視的鋳造欠陥の影響(GS.F-3 疲労)

概要

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Aluminium alloy die casting products are extensively used in the industries of vehicle and electronics. However, one disadvantage of such die castings is the presence of casting defects and the reduction of strength properties by the defects. In this study, the fatigue tests of aluminium alloy die casting ADC12 were carried out under tension-compression axial loading and the relations between stress amplitude and failure life was derived. The fatigue life of ADC12 was greatly influenced by the situation and the amount of casting defects. By observing the fracture surface, it was shown that the crack propagates by combining local fatigue crack with casting defects and the fatigue life of the specimen with large inner enclosures becomes shorter than that of the specimen with casting defects.
一般社団法人日本機械学会の論文
2007-10-24