大形試験片による疲れ試験結果 : 第3報, 高周波焼入れしたV形切欠き試片について

概要

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The authors have conducted fatigue tests on the induction-hardened V-notched specimens, 50 mm in diameter. The experimental results are summalized in the following. In the normalized V-notched specimen (α is nearly 7.65), the value of σ_<w2> is 6.5kg/mm^2 and σ_<w1> is 1.5 kg/mm^2 (this is tredicted on Mr. Ouchida's data), but in the induction-hardened V-notched specimen, these values are very large, that is, σ_<w2> is the fatigue limit causing the failure of a whole piece, and σ_<w1> is the lowest of the stresses causing the start of crack at the bottom of V-notch after infinite number of repetitions. Lastly, the authors discussed the reason why σ_<w2> and σ_<w1> of the induction-hardened specimens are very large in comparison with those of the normalized ones.
一般社団法人日本機械学会の論文
1961-01-25