발간논문

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Vol.30, No.5, 516 ~ 524, 1992
Title
Compression Fatigue Crack Initiation and Growth of a 2124 Al - SiCw Composite
김영환Young Hwan Kim, 이성학Sung Hak Lee, 권동일Don Gil Kwon, 최원봉Won Bong Choi
Abstract
The main objective of this study is to establish fatigue crack initiation and growth behavior of a powder metallurgy 2124 aluminum alloy-SiC whisker composite. Cyclic compressive loading was adopted for the fatigue experiments using compact tension type specimens. The effect of compressive overload in terms of ΔK variation was also examined. Fatigue crack initiation was found to occur easily for a given ΔK, but its crack length was saturated quickly. Following an overload, the saturation crack length increased again with increasing ΔK. The results provide a basis for the development of rational method to control fatigue crack length following a compressive overload.
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