Abstract: Based on modified θ projection method, creep experiments were carried out on GH4169 superalloy under different temperature and stress conditions,the creep data under different parameters were obtained and corresponding creep curves were drawn.The modified θ projection method was used to perform nonlinear fitting of the obtained experimental curve,and creep equations related to temperature and stress were established.The creep life curve of GH4169 superalloy is verified by the creep equations,and the results are in good agreement,so as to reach the effect of creep life prediction.

Key words: Superally GH4169, Modified &theta, projection method, Creep, Life prediction

摘要： 在不同温度和不同应力条件下，对GH4169高温合金进行了蠕变实验，得到不同参数下的蠕变数据并绘制了相应的蠕变寿命曲线。利用修正θ投影法，对得到的实验寿命曲线进行非线性拟合，建立了温度、应力相关的蠕变方程。用所建立的蠕变方程验证了GH4169高温合金蠕变寿命曲线，结果表明吻合性较好，达到了蠕变寿命预测的效果。

关键词: GH4169合金, 　修正θ投影法, 　蠕变, 　寿命预测