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首页> 外文期刊>材料 >Improvement of Creep Life Prediction of High Cr Ferritic Creep Resistant Steels by Region Partitioning Method of Stress vs. Time to Rupture Diagram
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Improvement of Creep Life Prediction of High Cr Ferritic Creep Resistant Steels by Region Partitioning Method of Stress vs. Time to Rupture Diagram

机译：压力与应力的区域分区方法改进高Cr铁素体蠕变抗性钢的蠕变寿命预测。

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摘要

Creep life prediction method has been investigated on 9-12Cr ferritic creep resistant steels in conjunction with region partitioning method of stress vs. time to rupture diagram. Region partitioning method of stress vs. time to rupture diagram has been discussed from a viewpoint of correspondence of breakdown observed in stress vs. time to rupture curves with both change in creep deformation behaviour and 0.2 percent proof stress. Good correspondence have been observed between breakdown in stress vs. time to rupture curve and the stress condition where the onset strain of tertiary creep stage is 0.012 and 1/2 of the 0.2 percent proof stress. It has been concluded that creep rupture data in the stress region less than 1/2 of the 0.2 percent proof stress should be used for a long-term creep life prediction by Larson-Miller parameter with a constant of 20.
机译：已经在9-12Cr铁素体蠕变抗钢上研究了蠕变寿命预测方法，结合应力与第三次应力的时间分配方法。 从应力比对应率的对应对应的观点来讨论了应力Vs的区域分配方法。随着蠕变变形行为的变化和0.2％的抗衡应力发生破裂曲线的故障对应的观点来讨论了破裂图。 在应力方面的击穿之间观察到良好的对应关系与破裂曲线的时间和第三次蠕变阶段的起始菌株为0.012和0.2％的1/2的应力条件。 已经得出结论，应力区域的蠕变破裂数据小于0.2％的1/2，应通过恒定的Larson-Miller参数用于20％的长期蠕变寿命预测。

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