低温焼入れ材の微小疲労き裂進展・停留挙動に及ぼす室温時効の影響

概要

論文の詳細を見る
The effects of room temperature aging treatment are discussed on the critical condition for the onset of growth of non-propagating cracks on 0.15% C low carbon steel, with special emphasis on the length of the critical non-propagating crack and on the crack opening displacement at the crack tip. It is found from the experimental analysis that the aging treatment of a fatigue precracked specimen for 30 days at room temperature introduced the closure of a crack tip of the pre-crack and the reduction of crack opening displacement at the wake of crack, together with an improvement in crack growth resistance of the microstructure. This may cause an increase in the endurance limit of the specimen, through the enhancement of effective stress for the onset of growth of the critical non-propagating crack.
社団法人日本機械学会の論文
1985-11-25