Effect of Cyclic Strain Ageing on the Critical Cyclic Stress Required to Propagate a Crack in Low Carbon Steels

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概要

• 論文の詳細を見る

• Smooth, notched and precracked specimens were fatigued in rotating bending at elevated temperature. A comparison of the fatigue limit at 375℃ with that at room temperature indicates that the fatigue strength is enhanced by the rapid strain ageing occurring during fatigue at 375℃. While the increase in the crack initiation fatigue limit of smooth and notched specimens were about 24% and 28% respectively, the increase in the crack propagation fatigue limit of notched specimen was about 56%. The notch root radius at the branch point at 375℃ becomes about two times that at room temperature. The increase in the fatigue limit of precracked specimen which contains a crack of 0.15 to 1.4 mm length is 40 to 110%. It is concluded that the rapid strain ageing has a greater influence on the critical stress for crack propagation and on the threshold stress intensity factor than on the critical stress for crack initiation.

• 一般社団法人日本機械学会の論文

著者

• Kato Yozo

  Faculty Of Engineering Gifu University

• Kato Yozo

  Professor Faculty Of Engineering Gifu University

• Hirose Motohisa

  Junior Technical College Gifu University

• HIROSE Motohisa

  Assistant Professor, Junior Technical College, Gifu University

• HASEGAWA Norihiko

  Research Associate, Faculty of Engineering, Gifu University

関連論文

• The Effect of Low Temperature Quenching and Quench Ageing on the Fatigue Strength of Notched Specimens of Low Carbon Steels
• Effect of Grain-size on Fatigue Strength of Low Carbon Steel at Elevated Temperatures
• The Effect of Strain Aging on Threshold Value for Surface Crack : Propagation of S45C Round Bar in Rotatory Bending
• Fatigue Strength of Low Carbon Steel Plate with a Sharp Notch and a Precrack under Plane Bending at Elevated Temperatures
• The Effect of Cyclic Stress Hysteresis at Elevated Temperature on the Crack Propagation Behavior in Smooth Specimens of O.45% Carbon Steel
• Effect of Cyclic Strain Ageing on the Critical Cyclic Stress Required to Propagate a Crack in Low Carbon Steels

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