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GH4133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.
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