High strain rate and high temperature behaviour of metallic materials for jet engine turbine containment
High strain rate and high temperature behaviour of metallic materials for jet engine turbine containment
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DOI：
10.1051/jp4:2006134041
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发表时间：
2006-08
期刊：
影响因子：
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通讯作者：
F. Gálvez;D. Cendón;A. Enfedaque;V. Sánchez-Gálvez
中科院分区：
文献类型：
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作者：
F. Gálvez;D. Cendón;A. Enfedaque;V. Sánchez-Gálvez
这项工作提出了一项研究的机械特性的材料涉及空气喷气发动机涡轮。最后的目的是分析涡轮叶片脱落的现象，以验证壳体密封的要求。涡轮中的材料处于高温下，温度范围从400°C到800°C，当叶片发生故障时，如果冲击到外壳，达到应变率高达10.3 s -1。为了获得材料的性能，必须同时在高应变速率和高温下进行试验。实验装置采用分离式霍普金森压力棒，并采用高温炉。设备上使用的棒是高强度镍合金，带有冷却系统，以降低测量设备的温度。还研究了温度梯度引起的波色散的影响，以便在必要时对测量结果进行校正。测试的材料是表壳上使用的FV535不锈钢。得到了不同温度下应变速率为10 3 s -1时的应力-应变曲线。实验结果表明，应变速率和温度的影响是不可忽视的。Johnson-Cook材料模型用于拟合材料试验的结果。
This work presents a study on the mechanical characterisation of the materials involved in air jet engine turbines. The final objective is to analyse the phenomenon of a turbine blade off failure, to verify the requirements of the case containment. The materials in the turbine are under high temperatures, ranging from 400°C to 800' C and when the fail of the blade occurs if impacts against the case, reaching strain rates up to 10 3 s -1 . To obtain the behaviour of the materials, testing at high strain rate and high temperature at one time is necessary. The experimental set-up used was a split Hopkinson pressure bar, with a high temperature furnace adapted. The bars used on the device were high strength nickel alloys with a cooling system to decrease the temperature of the measurement devices. The effect of wave dispersion due to the temperature gradient has been also studied to correct the measurements if necessary. The material tested has been the FV535 stainless steel used on the case. The full stress-strain curves at different temperatures and at strain rates up to 10 3 s -1 have been obtained. The experimental results show a marked influence of the strain rate and the temperature that cannot be neglected. The Johnson-Cook material model has been used to fit the results of the material tests.