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首页> 外文期刊>The Journal of Strain Analysis for Engineering Design >Investigation on the deformation and microstructure evolution of P91 steel in short-term small punch creep test
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Investigation on the deformation and microstructure evolution of P91 steel in short-term small punch creep test

机译：短期小冲头蠕变试验中P91钢的变形和组织演变的研究

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Small punch creep test is a semi-destructive method which can be used for creep determination and assessment of the probability of failure. The deformation during this small punch creep test is very complicated because the accumulation of both plastic and creep deformation will lead to the failure. In order to understand the mechanism of small punch creep test from grain orientation changes during creep and fracture process, small punch creep test was carried out using P91 steel under a 500N load at 600 degrees C in this study. Finite element method was used to simulate the mechanical deformation process. Electron back-scattered diffraction technique and texture analysis were used to analyze the microstructure of the small punch creep deformation and rupture. The results showed that the grain orientation evolves from the rather random orientation in the first stage to the110//ND texture in the tertiary stage which caused mainly by shear strain.
机译：小冲头蠕变试验是一种半破坏性方法，可用于蠕变确定和评估失效概率。在这种小的冲头蠕变试验中，变形非常复杂，因为塑性变形和蠕变变形的累积都会导致失效。为了从蠕变和断裂过程中晶粒取向的变化中了解小冲头蠕变试验的机理，本研究中使用P91钢在500N负载和600摄氏度下进行了小冲头蠕变试验。用有限元方法模拟了机械变形过程。利用电子背散射衍射技术和织构分析技术分析了小冲头的蠕变变形和断裂的微观结构。结果表明，晶粒取向从第一阶段的随机取向发展到第三阶段的<110> // ND织构，这主要是由剪切应变引起的。

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