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Influence of annealing texture on dynamic tensile deformation characteristics of Dual phase steel

机译：退火织构对双相钢动态拉伸变形特性的影响

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摘要

Effect of industrial continuous annealing conditions on 67% cold rolled steel intended for producing dual phase steel is reported in this study. Evolution of dual phase microstructure and bulk texture during two different industrial continuous annealing process conditions were analysed using scanning electron microscope and x-ray diffractometer. Annealed dual phase steels were tensile deformed under quasi-static and dynamic deformation conditions. Deformed specimens were evaluated for bulk texture changes with respect to tensile deformation strain rates. The study revealed the effect of variation in industrial continuous annealing process on microstructure evolution, especially with respect to spatial second hard phase distribution and bulk texture. Depending on the heating rates and peak annealing temperature the spatial distribution of martensite was found to change from predominant grain boundary type to “in grain” type. A variation in bulk texture intensity was also observed. The weak annealing texture of α- and γ- bcc texture fibres were found to improve dynamic tensile deformation characteristic of steel.
机译：本研究报道了工业连续退火条件对用于生产双相钢的67％冷轧钢的影响。使用扫描电子显微镜和X射线衍射仪分析了两种不同的工业连续退火工艺条件下双相组织和整体结构的演变。退火双相钢在准静态和动态变形条件下拉伸变形。评估变形试样相对于拉伸变形应变速率的整体质地变化。研究揭示了工业连续退火过程中的变化对微观结构演变的影响，特别是在空间第二硬相分布和整体织构方面。根据加热速率和峰值退火温度，发现马氏体的空间分布从主要的晶界类型改变为“晶粒内”类型。还观察到整体质地强度的变化。发现α-和γ-bcc织构纤维的弱退火织构可以改善钢的动态拉伸变形特性。

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