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A modified theta projection model for the creep behaviour of creep-resistant steel

机译:用于抗蠕变钢的蠕变行为的改进的THETA投影模型

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摘要

A modified theta projection model is proposed for the description of creep behaviour. The model shows very good flexibility in fitting the entire test data of the creep-resistant steel 12Cr1MoV over the three creep stages. The capability of describing the primary to secondary stage makes it easier to precisely evaluate the steady state or minimum creep rate using the model. The model is derived and modified from the original theta projection method. It also keeps the four indeterminate coefficients and can meet the convergence condition easily during regression by the least squares method. In this paper, the minimum creep rates of 12Cr1MoV are also obtained and discussed.
机译:提出了一种修改的THETA投影模型,用于描述蠕变行为。 该模型显示出在三个蠕变阶段拟合抗蠕变钢12Cr1mov的整个测试数据方面非常好。 描述初级阶段的能力使得更容易使用模型来精确地评估稳态或最小蠕变率。 从原始THETA投影方法派生和修改该模型。 它还保持四个不确定系数,并且可以在最小二乘法中容易地满足收敛条件。 在本文中,还获得并讨论了12Cr1mov的最小蠕变率。

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