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首页> 外文期刊>Journal of engineering materials and technology >Critical Review and Appraisal of Traditional and New Procedures for the Quantification of Creep Fracture Behavior Using 1 Cr-1Mo-0.25V Steel
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Critical Review and Appraisal of Traditional and New Procedures for the Quantification of Creep Fracture Behavior Using 1 Cr-1Mo-0.25V Steel

机译：使用1 Cr-1Mo-0.25V钢对蠕变断裂行为进行定量的传统方法和新方法的严格审查和评估

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摘要

The approaches traditionally used to quantify creep and creep fracture are critically assessed and reviewed in relation to a new approach proposed by Wilshire and Scharn-ing. The characteristics, limitations, and predictive accuracies of these models are illustrated by reference to information openly available for the bainitic lCr-1Mo-0.25V steel. When applied to this comprehensive long-term data set, the estimated 100,000-300,000 h strength obtained from the older so called traditional methods varied considerably. Further, the isothermal predictions from these models became very unstable beyond 100,000 h. In contrast, normalizing the applied stress through an appropriate ultimate tensile strength value not only reduced the melt to melt scatter in rupture life, but also the 100,000 h strengths determined from this model for this large scale test program are predicted very accurately by extrapolation of creep life measurements lasting less than 5000 h. The approach therefore offers the potential for reducing the scale and cost of current procedures for acquisition of long-term engineering design data.
机译：相对于Wilshire和Scharn-ing提出的新方法，严格评估和审查了传统上用于量化蠕变和蠕变断裂的方法。这些模型的特征，局限性和预测精度通过参考公开提供给贝氏体ICr-1Mo-0.25V钢的信息进行了说明。当应用于这个综合的长期数据集时，从较旧的所谓传统方法获得的估计100,000-300,000 h强度相差很大。此外，这些模型的等温预测在超过100,000小时后变得非常不稳定。相比之下，通过适当的极限拉伸强度值对施加的应力进行归一化，不仅可以减少熔体在断裂寿命中的熔融扩散，而且可以通过蠕变外推法非常准确地预测此模型针对大型测试程序确定的100,000 h强度寿命测量持续不到5000小时。因此，该方法为减小用于获取长期工程设计数据的当前程序的规模和成本提供了潜力。

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    M. Evans;

  • 作者单位

    School of Engineering,Swansea University,Singleton Park,Swansea SA2 8PP, UK;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
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