东北大学学报（自然科学版）

东北大学学报:自然科学版 ›› 2016, Vol. 37 ›› Issue (10): 1403-1406.DOI: 10.12068/j.issn.1005-3026.2016.10.008

• 材料与冶金 • 上一篇    下一篇

三叉晶界优先形核模型及其动态再结晶仿真

关小军1,2， 付杰1,2   

  1. (1. 山东大学 材料液固结构演变与加工教育部重点实验室， 山东 济南 250061； 2. 山东大学 材料科学与工程学院， 山东 济南250061)
  • 收稿日期:2015-06-16 修回日期:2015-06-16 出版日期:2016-10-15 发布日期:2016-10-14
  • 通讯作者: 关小军
  • 作者简介:关小军(1952-)，男，湖南湘阴人，山东大学教授.
  • 基金资助:
    教育部高等学校博士学科点专项科研基金资助项目(200804220021).

Preferential Nucleation Model at Triple Junction and Its Dynamic Recrystallization Simulation

GUAN Xiao-jun1,2， FU Jie1,2   

  1. 1. Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials
  • Received:2015-06-16 Revised:2015-06-16 Online:2016-10-15 Published:2016-10-14
  • Contact: GUAN Xiao-jun
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摘要： 为了实现三叉晶界处动态再结晶优先形核，基于元胞自动机的摩尔邻居，提出一个辨识三叉晶界处元胞的方法和三叉晶界优先形核模型，通过HPS485wf钢动态再结晶过程的元胞自动机仿真检验了该模型的合理性和应用效果.研究结果表明，所提方法和优先形核模型可有效用于动态再结晶过程仿真；与传统模型相比，其仿真结果不仅保持了由传统模型仿真得到的动态再结晶的多轮次演变过程、组织形貌特征、“S型”的动态再结晶面积分数-应变曲线和全程流变应力模拟精度(0.1%)，而且能够在所辨识三叉晶界处实现优先形核，更真实地反映了动态再结晶的形核现象.

关键词: 动态再结晶, 三叉晶界, 优先形核, 元胞自动机, 仿真

Abstract: In order to perform preferential nucleation at triple junction during dynamic recrystallization (DRX)， a method of identifying the cell existed at triple junction and a preferential nucleation model at triple junction were proposed on the basis of the Moore neighbor of cellular automata. The rationality and application of the model were proved by simulating the DRX process of HPS485wf steel. The results showed that the proposed method and model have the ability to simulate the DRX more effectively. Compared with those from the traditional models， the results from the present model don’t only maintain the evolution of multiple rounds， microstructural feature， the “S-type” curve between area fraction and strain， the simulated flow stress with an accuracy of 0.1% in the process of DRX， and also reveal the preferential nucleation at triple junction， which would provide a more realistic DRX nucleation.

Key words: dynamic recrystallization, triple junction, preferential nucleation, cellular automata, simulation

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