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通过在热机械循环最高温度处进入不同保持时间 ,研究了保持时间对涡轮盘材料GH41 33合金热机械疲劳性能及其寿命的影响。结果表明 ,对于不同保持时间 ,无论是同相位热机械疲劳还是反相位热机械疲劳 ,材料在温度升高的过程中均呈现循环软化特性 ,并且随着应变量的增大循环软化速率加快 ,在温度降低的过程中无明显的循环硬化或循环软化 ;而保持时间对同相位热机械疲劳寿命影响较为显著 ,而对反相位热机械疲劳寿命几乎没有影响
The effect of holding time on the thermo-mechanical fatigue properties and lifetime of turbine disk material GH41 33 was investigated by entering different hold times at the maximum temperature of the thermomechanical cycle. The results show that for different holding time, both in the same phase of thermo-mechanical fatigue and anti-phase thermo-mechanical fatigue, the material shows the cyclic softening characteristics in the process of temperature increase, and the rate of cyclic softening increases with the increase of strain, In the course of decreasing the temperature, there is no obvious cycle hardening or cyclic softening, while the holding time has more significant effect on the same phase thermo-mechanical fatigue life, but has almost no effect on the anti-phase thermo-mechanical fatigue life