HIP処理を施した鋳造Al合金の小形卓上試験機による疲労信頼性評価

概要

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Fatigue reliability of HIP-treated aluminum alloy casting was evaluated with a compact test machine. the main results obtained were as follows. Fatigue limit of aluminum alloy casting could be recognized in two types of fatigue test. Difference of fatigue life between axial and plane bending fatigue tests was resulted in size effect of specimen. Fatigue cracking of HIP-treated aluminum alloy casting initiated in grain of aluminum alloy was induced by slip. Fatigue crack growth characteristics of aluminum alloy casting were evaluated using ΔK. The da/dN-ΔK curves was controlled by Paris'law, and ΔK_<th> was not found in the fatigue crack propagation diagram of this material. Fatigue life of aluminum alloy casting was evaluated with attention to reliability analysis, and was found to be affected by aluminum grain size in the bulk of the specimen.
社団法人日本機械学会の論文
1996-01-25