镍基高温合金的热机械疲劳寿命预测模型研究
Research on Thermo-mechanical Fatigue Life Prediction Model of Ni-base Superalloy
崔海涛 1钱春华1
作者信息
- 1. 南京航空航天大学能源与动力学院,南京,210016
- 折叠
摘要
针对发动机热端部件常用材料镍基高温合金GH4169进行了 200～450 ℃及400～650 ℃条件下的同相位热机械疲劳(TMF)试验,考虑TMF条件下多晶材料在弹性阶段产生的微观损伤应变能,提出一种适用于多晶材料的TMF寿命预测模型,并结合试验数据确定模型参数;采用GH4169、IN718、DD8三种高温合金对该模型的TMF寿命预测能力进行评估,结果表明,提出的寿命模型预测精度高于TMF寿命预测常用的Manson-Coffin模型和Ostergren模型.
Abstract
In phase TMF tests on nickel-based high-temperature alloy GH4169,a commonly used material for engine hot end components,under conditions of 200-450 ℃ and 400-650 ℃ is conduc-ted.Considering the micro damage strain energy of polycrystalline materials in the elastic stages under the condition of TMF,a TMF life prediction model suitable for polycrystalline materials was pro-posed,model parameters were determined by combining the TMF test data.Three superalloys,GH4169,IN718,DD8,were used to evaluate the TMF life prediction ability of this model.The pre-diction accuracy of the life model is higher than that of the Manson-Coffin model and Ostergen model commonly used for TMF life prediction.
关键词
镍基高温合金/热机械疲劳(TMF)/损伤应变能/寿命预测Key words
nickel-base superalloy/thermo-mechanical fatigue(TMF)/dmamage strain energy/life prediction引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
维普
万方数据