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An evaluation of the capability of data conversion of impression creep test

机译:对印模蠕变试验数据转换能力的评价

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摘要

High temperature power plant components are now working far beyond their operative designed life. Therefore, establishing their in-service material properties is a matter of significant concern. Reliable secondary creep data can be produced by impression creep test (ICT), which requires a small volume of material that can be scooped from in-service critical components. This paper presents an overview of ICT to highlight the capability in determining the minimum creep strain rate (MSR) data by use of conversion relationships that relates uniaxial and impression creep tests data. Some existing ICT data are critically reviewed. Furthermore, this paper presents some new impression creep test data and their correlation with uniaxial data, obtained from a number of steels at different stresses and temperatures. The presented data, in terms of MSR against the reference uniaxial stress, are used to assess the capability and reliability of the ICT method.
机译:高温电厂组件现在正在超出其设计的设计寿命。 因此,建立其在役材料属性是一个重要关注的问题。 可靠的二次蠕变数据可以通过印模蠕变试验(ICT)产生,这需要少量的材料可以从适用于适用的关键部件中舀出。 本文概述了ICT,以突出通过使用转换关系来确定最小蠕变应变速率(MSR)数据的能力,所述转换关系与单轴和印模蠕变测试数据相关。 一些现有的ICT数据受到严格审查。 此外,本文提出了一些新的印模蠕变试验数据及其与单轴数据的相关性,从不同应力和温度的多个钢中获得。 根据MSR针对参考单轴应力而言,所提出的数据用于评估ICT方法的能力和可靠性。

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