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本文总结的是室温总应变范围恒定的低周疲劳试验。由于发动机涡轮盘螺栓孔和内径处的常温低周疲劳是设计寿命的主要限制因素之一,因此,我们一方面是想对901和TC4等主要用作涡轮盘、压气机盘材料的高温合金和钛合金承受反复应变的抗力有一个大概的了解,同时也想对低周疲劳试验方法及数据处理和结果分析积累经验。对每种合金先做一次拉伸试验,然后进行不同总应变范围的疲劳试验。试验数据按传统的Manson-Coffin公式和断裂力学两种方式进行处理。
This paper summarizes the low-cycle fatigue test with a constant total strain range at room temperature. As the engine turbine disk bolt hole and the inner diameter of the low temperature fatigue at low temperature is one of the major design life limitations, we are on the one hand want to 901 and TC4 and other mainly used as turbine disk, compressor disk material superalloys and Titanium has a rough understanding of the resistance to repeated strain, and also wants to accumulate experience with low-cycle fatigue test methods and data processing and analysis of results. Tensile tests were performed on each alloy first, followed by fatigue tests at different total strain ranges. The experimental data are processed according to the traditional Manson-Coffin formula and fracture mechanics.