ZTC4钛合金不同应变比下应变疲劳寿命估算
Evaluation of strain fatigue life in ZTC4 titanium alloy with different strain ratios
陈玮君
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作者单位：西北工业大学 材料学院
中文关键字：ZTC4钛合金；Zheng公式；疲劳寿命预测
英文关键字：ZTC4 alloy；Zheng formula；Fatigue life predict
中文摘要：对ZTC4钛合金进行应变比为R=-1、R=0.1和R=0.5的应变疲劳试验，并运用Zheng公式对实验数据进行分析，得到三个应变比下的应变疲劳寿命曲线。通过修正Zheng公式中的Δεt，得到受应变比R影响的当量应变范围Δεt*，从而得到含应变比R因子的归一化模型，用于预测不同应变比下ZTC4的应变疲劳寿命。
英文摘要：The strain fatigue test of ZTC4 titanium alloy was carried with the R-ratio of -1, 0.1 and 0.5.The strain-life curve with the three R-ratios was given by using the Zheng formula. The R-normalized model, which was used to predict the strain fatigue life of ZTC4 titanium alloy under different R-ratios, can be obtained by modify the strain range Δεt in the Zheng formula into the equivalent strain range Δεt* which was effected by the R-ratio.