構造用鋼の腐食疲労強度に及ぼす切欠き効果

概要

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The notch effect on corrosion-fatigue strength was investigated for high-strength steels of HT50 and HT80. In ion exchanged water, the fatigue strengths of HT80 were not affected by slight notches, and then decreased with an increase of α_k (stress concentration factor). When α_K was further increased, they reached a value which is probably the corrosion-fatigue strength of the circular cracked test pieces. For HT50, the fatigue strength decreased from slight notches, and the strength of a sharp notch coincides with that of HT80. In synthetic sea water, the fatigue strength was considerably lower, and was independent of the materials. However, a similar notch effect was obtained. This behavior can be explained from observations of the surface and the cracks of test pieces.
一般社団法人日本機械学会の論文
1986-01-25