通过对典型的热机械疲劳寿命预测模型的分析，结合GH4133合金的热机械疲劳损伤特性，建立了热机械疲劳寿命预测模型--新的损伤分数模型。用该模型预测了GH4133合金在571～823 ℃的热机械疲劳寿命。结果表明，新的寿命预测模型不仅简便，而且预测精度较高。
Based on analyzing some typical models of TMF life prediction, a new model for predicting nickel-base superalloy TMF lifetime was proposed. With the new model, the TMF life of GH4133 was calculated accurately in the temperature range of 571～823 ℃. The comparison between experimental and calculated TMF life has been made and all results fall in the scatter band of 1.5. The calculated results showed that the new model is not only simple, but also precise. The establishment of this model will play great roles in life prediction for metals and engineering components subjected to non-isothermal service.
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