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首页> 外文期刊>Metals >Tensile Ductility of Nanostructured Bainitic Steels: Influence of Retained Austenite Stability
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Tensile Ductility of Nanostructured Bainitic Steels: Influence of Retained Austenite Stability

机译：纳米贝氏体钢的拉伸延展性：残余奥氏体稳定性的影响

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High silicon (>1.5%) steels with different compositions were isothermally transformed to bainite at 220 and 250 °C to produce what is often referred to as nanostructured bainite. Interrupted tensile tests were carried out and the retained austenite was measured as a function of strain. Results were correlated with tensile ductility. The role of retained austenite stability is remarkably underlined as strongly affecting the propensity to brittle failure, but also the tensile ductility. A simple quantitative relationship is proposed that clearly delimitates the different behaviours (brittle/ductile) and correlates well with the measured ductility. Conclusions are proposed as to the role of retained austenite fraction and the existence of a threshold value associated with tensile rupture.
机译：将具有不同成分的高硅钢（> 1.5％）在220和250°C下等温转变为贝氏体，以生产通常被称为纳米结构的贝氏体。进行了中断的拉伸试验，并测量了残余奥氏体随应变的变化。结果与拉伸延展性相关。突出强调了保持奥氏体稳定性的作用，因为它强烈影响脆性破坏的倾向，但也影响拉伸延展性。提出了一种简单的定量关系，该关系清楚地界定了不同的行为（脆性/韧性），并与测得的延展性很好地相关。提出了关于残余奥氏体分数的作用以及与拉伸断裂有关的阈值的存在的结论。

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