IN718合金热机械疲劳试验非稳态温度场的数值模拟
发布时间：2019-03-07 09:24
【摘要】：基于热机械疲劳试验,建立IN718高温合金感应加热过程中电磁场和温度场耦合的数学模型,对试样在循环加热条件下的非稳态温度场进行仿真,采用电子背散射衍射技术对试样上的晶粒尺寸进行检测并对其数据进行统计分析。结果表明:综合传热系数和风机电压呈正相关的关系;试样径向上存在温度梯度且随时间变化,最大温差为5℃左右,符合试验要求;低周疲劳试样径向上不同点的平均晶粒尺寸均有所增长,且增长幅度基本相同;由于温度梯度的影响,热机械疲劳试样径向上的晶粒尺寸分布不均匀,中心位置和表面位置的平均晶粒尺寸增长幅度分别为16.94%和5.3%。
[Abstract]:Based on the thermo-mechanical fatigue test, a mathematical model of coupling electromagnetic field and temperature field during induction heating of IN718 superalloy is established, and the unsteady temperature field of the specimen under cyclic heating is simulated. The grain size on the sample was measured by electron backscattering diffraction and the data were analyzed statistically. The results show that there is a positive correlation between the comprehensive heat transfer coefficient and the fan voltage, the temperature gradient exists in the radial direction of the test sample and changes with time, and the maximum temperature difference is about 5 鈩，
本文编号：2435986
[Abstract]:Based on the thermo-mechanical fatigue test, a mathematical model of coupling electromagnetic field and temperature field during induction heating of IN718 superalloy is established, and the unsteady temperature field of the specimen under cyclic heating is simulated. The grain size on the sample was measured by electron backscattering diffraction and the data were analyzed statistically. The results show that there is a positive correlation between the comprehensive heat transfer coefficient and the fan voltage, the temperature gradient exists in the radial direction of the test sample and changes with time, and the maximum temperature difference is about 5 鈩，
本文编号：2435986
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