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Quantitative analysis of dynamic recrystallization behavior using a grain boundary evolution based kinetic model

机译：使用基于晶界演化的动力学模型对动态再结晶行为进行定量分析

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摘要

A theoretical model that considers the fundamental metallurgical principles of dynamic recrystallization (DRX) has been developed for hot working involving DRX. Mobile grain boundary area, immobile grain boundary area and dislocation density are introduced as state variables to describe nucleation, grain growth and impingement in DRX. The model can predict plastic flow behavior, average grain size and volume fraction of DRX. Predictions of the model are in good agreement with experimental results of an OFHC copper. It is observed that the flow stress behavior is associated with the evolution of mobile grain boundaries. The damped oscillation behavior of mobile grain boundary area at high temperatures or low strain rates leads to the oscillation of flow stress, while the over-damped behavior of mobile grain boundary area at low temperatures or high strain rates results in a monotonic peak of flow stress.
机译：对于涉及DRX的热加工，已经开发了一种理论模型，该模型考虑了动态再结晶（DRX）的基本冶金原理。介绍了可移动晶界面积，不可移动晶界面积和位错密度作为状态变量，以描述DRX中的形核，晶粒长大和撞击。该模型可以预测塑性流动行为，平均晶粒尺寸和DRX的体积分数。该模型的预测与OFHC铜的实验结果非常吻合。观察到流动应力行为与可移动晶界的演变有关。高温或低应变率下可移动晶界区域的阻尼振荡行为导致流动应力的振荡，而低温或高应变率下可移动晶界区域的过度阻尼行为导致流动应力的单调峰值。 。

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  • 来源
    《Materials Science and Engineering》 |2010年第22期|P.5368-5377|共10页
  • 作者

    X.G. Fan; H. Yang; Z.C. Sun; D.W. Zhang;

  • 作者单位

    State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, P.O. Box 542, Xi'an 710072, PR China;

    State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, P.O. Box 542, Xi'an 710072, PR China;

    State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, P.O. Box 542, Xi'an 710072, PR China;

    State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, P.O. Box 542, Xi'an 710072, PR China;

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

    dynamic recrystallization; analytical method; grain boundary evolution; microstructure; plastic deformation behavior;

    机译：动态重结晶;分析方法晶界演化;微观结构塑性变形行为;

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