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The effect of processing parameters on the dynamic recrystallisation behaviour of API-X70 pipeline steel

机译:工艺参数对API-X70管线钢动态再结晶行为的影响

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摘要

The effect of deformation temperature and strain rate on the dynamic recrystallisation (DRX) behaviour of X70 pipeline steel was investigated. DRX parameters such as the critical and peak stresses and strains as well as the deformation activation energy were determined in the temperature range between 925 ℃ and 1125 ℃ for strain rates of 0.1, 1 and 5 s~(-1). The relationship between the peak stresses and strains with the Zener-Hollomon parameter was determined. The dynamically recrystallised volume fraction was computed as a function of the different temperatures and strain rates. The APRGE software was applied for the first time on electron back-scattering diffraction data of dynamically recrystallised microstructures in order to reconstruct the prior austenite from the as-quenched martensite phase. The dynamically recrystallised flow stress curves and microstructure were also predicted using cellular automata modelling. The results show an earlier onset of DRX with a decrease in strain rate or an increase in deformation temperature. The dynamically recrystallised grain size is also found to decrease with an increase in strain rate and a lowering of deformation temperature.
机译:研究了变形温度和应变速率对X70管线钢动态再结晶行为的影响。在0.1 s,1 s和5 s〜(-1)的应变速率下,在925℃至1125℃的温度范围内确定了DRX参数,如临界应力和峰值应力,应变以及变形激活能。用Zener-Hollomon参数确定了峰值应力和应变之间的关系。动态重结晶的体积分数是根据不同温度和应变速率计算的。 APRGE软件首次应用于动态再结晶组织的电子背散射衍射数据,以便从淬火后的马氏体相重建先前的奥氏体。动态重结晶的流动应力曲线和微观结构也使用细胞自动机建模进行了预测。结果表明,DRX的发生较早,应变速率降低或变形温度升高。还发现动态再结晶晶粒尺寸随着应变速率的增加和变形温度的降低而减小。

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  • 来源
    《Materials Science and Engineering》 |2013年第15期|70-81|共12页
  • 作者单位

    School of Mechanical, Materials and Mechatronic Engineering, University of Wollongong, New South Wales 2522, Australia;

    School of Mechanical, Materials and Mechatronic Engineering, University of Wollongong, New South Wales 2522, Australia;

    School of Mechanical, Materials and Mechatronic Engineering, University of Wollongong, New South Wales 2522, Australia,Currently with High Temperature Processing Laboratory, CSIRO Process Science and Engineering, Pullenvale, Queensland 4069, Australia;

    School of Mechanical, Materials and Mechatronic Engineering, University of Wollongong, New South Wales 2522, Australia,Electron Microscopy Centre, University of Wollongong New South Wales 2519, Australia;

    CEA, DRT, LITEN, Minatec, 38054 Grenoble Cedex 9, France;

    School of Mechanical, Materials and Mechatronic Engineering, University of Wollongong, New South Wales 2522, Australia,Electron Microscopy Centre, University of Wollongong New South Wales 2519, Australia;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Pipeline steel; Thermo-mechanical processing; Dynamic recrystallisation; Electron back-scattering diffraction; Grain reconstruction; Cellular automata;

    机译:管线钢;热机械加工;动态重结晶;电子背散射衍射;谷物重建;细胞自动机;

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