2032 引張平均応力下における高強度鋼の疲労特性(S11-2 軸荷重下の超高サイクル疲労特性,S11 金属材料の超高サイクル疲労特性の解明)

概要

論文の詳細を見る
Effect of stress ratio on fatigue properties was investigated for SUP12 spring steel. In this research, fatigue life and crack propagation tests were conducted under several stress ratios. In the fatigue life tests, internal fracture occurred at any stress ratio, while this steel was more prone to the internal fracture at high stress ratios. Orgins of the internal fracture were mostly an Al_2O_3 inclusion under R≧0, while many of them were a matrix crack under R=-1. The fatigue limits determined at 10^8 cycles were higher than a modified Goodman line under all stress ratio. In comparing the fatigue limits with ΔK_<th>, the dependency on the stress ratios was similar to each other.
社団法人日本機械学会の論文
2007-09-07