高温で溶体化処理したAC4CHアルミニウム合金鋳物の組織と疲労特性 [in Japanese] Effects of Solidification Structure on Fatigue Properties of AC4CH Aluminum Casting Alloy Solution Treated at High Temperature [in Japanese]
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The effects of solidification structure on the fatigue life and fatigue crack growth behavior in AC4CH aluminum casting alloy were experimentally investigated in view of the size of the dendrite arm spacing, morphology and size of eutectic silicon particles. Fatigue life and fatigue crack growth tests were performed under the controlled load condition using smooth type and CT type specimens. The specimens were solution-treated at a relatively higher temperature, 843K. The results obtained are summarized as follows ; (1) The refining of the dendritic structure and eutectic silicon particles improved the fatigue life, suggesting that the casting defects exerted substantial influence on fatigue life. (2) The fatigue crack growth rate was decreased with the refining of the dendritic structure and eutectic silicon particles. (3) The high temperature solution treatment slightly incresed the fatigue crack growth rate.
- THE JOURNAL OF THE JAPAN FOUNDRYMEN'S SOCIETY
THE JOURNAL OF THE JAPAN FOUNDRYMEN'S SOCIETY 68(10), 891-897, 1996-10-25
Japan Foundry Engineering Society