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首页> 外文期刊>Philosophical magazine: structure and properties of condensed matter >Investigation on bainite transformation and metastable omega/orthorhombic martensite phases in as-quenched Cu-bearing ferrite steel
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Investigation on bainite transformation and metastable omega/orthorhombic martensite phases in as-quenched Cu-bearing ferrite steel

机译：贝氏体转化和稳压氧化铝/正交马氏体相的调查 - 淬火Cu轴承铁素体钢

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The as-quenched microstructures of low-carbon Cu-bearing ferrite steel are investigated by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). It is found that the granular bainite formation in Cu-bearing ferrite steel is attributed to a mixed mode of diffusional and displacive mechanisms. Besides, the particle-like or plate-shaped omega phases, along with thin-plate martensites consist of twin, are observed in the Mn 1.4Cu-bearing steel, and the orientation relationship is determined as: [2 - 1 - 10]. // [0 1 1](a) and (0 1 - 1 0)(omega) // (2 - 1 1)(a). The ultra-fine or ellipsoidal shaped nanoscale orthorhombic martensite phases, along with laths martensites consist of a high density of dislocations, are observed in the Mn0.66Cu-bearing steel, and the orientation relationship is determined as: [0 1 - 1] o//[-1 1 1]a and (-1 1 1) o//(1 0 1) a. A model is proposed to describe the overall martensite transformation kinetics by taking into account the Mn content, heterogeneity of C content and dislocation reactions play a major role in the subsequent martensite transformation.
机译：通过扫描电子显微镜（SEM）和透射电子显微镜（TEM）研究了低碳Cu承载铁素体钢的淬火微观结构。发现Cu承载铁氧体钢中的粒状贝氏体形成归因于混合模式的扩散和流离性机制。此外，在Mn 1.4Cu承载钢中观察到颗粒状或板状ω阶段，以及薄板马氏体组成的薄板马氏体组成，方向关系确定为：[2 - 1 - 10]。 // [01]（a）和（0 1 - 1 0）（ω）//（2 - 1 1）（a）。超细或椭圆形纳米级正交正式马氏体相阶段，以及LARHS马氏体由高密度的位错组成，在MN0.66Cu承载钢中观察到，方向关系确定为：[0 1 - 1] o // [ - 11 1] A和（-1 1 1）O //（1 0 1）a。提出了一种模型来描述整体马氏体转化动力学通过考虑Mn含量，C含量和位错反应的异质性在随后的马氏体转化中发挥着重要作用。

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