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首页> 外文会议>ASME Pressure Vessels and Piping conference >CREEP CRACK GROWTH PREDICTIONS IN 316H STEEL OVER A WIDE RANGE OF STRESSES AND TEMPERATURES
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CREEP CRACK GROWTH PREDICTIONS IN 316H STEEL OVER A WIDE RANGE OF STRESSES AND TEMPERATURES

机译：应力和温度范围内316H钢的蠕变裂纹增长预测

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摘要

The prediction of the creep crack growth (CCG) behaviour in engineering materials is of great importance in the life assessment of power plant components. The conventional technique to predict CCG is to employ uniaxial creep properties and appropriate damage models in finite element (FE) simulations or analytical CCG prediction models. Uniaxial creep trends for Type 316H SS have been recently estimated for a wide range of stresses and temperatures in and FE CCG predictions have been made at 550 °C and validated through comparison with the experimental data. In this paper, FE CCG predictions using the developed uniaxial creep trends for a wide range of stresses and temperatures are presented and the results are compared with the predicted CCG trend at 550 °C and also with the analytical constant creep ductility NSW CCG prediction models. The results from FE predictions are discussed in terms of the temperature effects on the creep deformation and crack growth behaviour of components operating at elevated temperatures.
机译：工程材料中蠕变裂纹扩展（CCG）行为的预测在电厂部件的寿命评估中非常重要。预测CCG的常规技术是在有限元（FE）模拟或CCG预测分析模型中采用单轴蠕变特性和适当的损伤模型。最近，已经估计了316H SS的单轴蠕变趋势，适用于各种应力和温度范围，并且在550°C下进行了FE CCG预测，并通过与实验数据的比较进行了验证。本文介绍了使用已开发的单轴蠕变趋势对各种应力和温度进行的有限元CCG预测，并将结果与​​550°C下的CCG预测趋势以及解析的恒定蠕变延性NSW CCG预测模型进行了比较。有限元预测的结果将讨论温度对在高温下运行的部件的蠕变变形和裂纹扩展行为的影响。

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