摘要
在对光滑试件和缺口试件进行高温疲劳－蠕变实验的基础上，分析了应力集中对ＧＨ２０３６合金低周疲劳－蠕变特性的影响。结果表明缺口试件的循环寿命远远低于光滑试件的循环寿命。将应变范围划分方法和改进的Ｎｅｕｂｅｒ原理相结合，得到了缺口部位高温低周疲劳－蠕变寿命估测的方法。用该方法估算ＧＨ２０３６合金的寿命并与实测寿命结果进行比较，证明此方法的预测效果良好。
A series of low cycle fatigue and creep fatigue tests were performed with a sueralloy on smooth and notched specimens.The cyclic stress strain behaviors and fracture characteristics of the notched specimens were emphatically investigated. A comparison of fatigue behavior between smooth and notched specimens was made and lifetime of notched specimens was evaluated. At the same temperature, the fatigue creep lives of the smooth specimens are far greater than that of the notched specimens.
出处
《航空材料学报》
EI
CAS
CSCD
1998年第4期45-51,共7页
Journal of Aeronautical Materials
关键词
低周疲劳
疲劳-蠕变性能
应力集中
高温合金
low cycle fatigue, creep fatigue behaviour, stress concentration, notch effects
