Acta Metallurgica Sinica (English Letters) ›› 2010, Vol. 23 ›› Issue (2): 154-160.DOI: 10.11890/1006-7191-102-154

• 研究论文 • 上一篇    

边裂和宽度对AZ31板材轧制的影响

戴庆伟   

  1. 重庆大学
  • 收稿日期:2009-10-30 修回日期:2010-02-26 出版日期:2010-04-25 发布日期:2010-04-08
  • 通讯作者: 戴庆伟

Effect of the width on AZ31 sheet rolling

Qingwei DAI1,2, Dingfei ZHANG1,2, Wei LAN3, Lin FANG1,2,Junping ZHANG1,2   

  1. 1) College of Materials Science and Engineering, Chongqing University, Chongqing, 400044,China
    2) National Engineering Research Center for Magnesium Alloys, Chongqing University,Chongqing 400044, China
    3) Chongqing University of Science and Technology, Chongqing 401331, China
  • Received:2009-10-30 Revised:2010-02-26 Online:2010-04-25 Published:2010-04-08
  • Contact: Dingfei ZHANG

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摘要：

为了研究边裂和AZ31板材轧制的宽度影响，采用了一个金字塔形状的板进行了实验和三维有限元模拟。结果表明，镁合金板材的边裂问题符合Normalized Crockroft&Latham理论。可以用D=-0.124+0.09X-0.008X2来预测边裂，其中X=板宽/板厚。当D大于0时将产生边裂。边部的剪切应力导致了裂纹的产生。随着X的变化应变速率周期性变化，且随宽度增加，再结晶晶粒减小。实验验证了有限元模型的正确性。

关键词: 有限元方法, 镁合金, 轧制, 边裂

Abstract:

A pyramid sheet has been used in experiments and three-dimensional finite element simulation to study the edge cracks and effects of width on AZ31 sheet under rolling. Results show that the edge cracks of Mg sheet comply with the Normalized Crockroft & Latham theory. It can be predicted by D=-0.124+0.09X-0.008X2, if D≥0, the edge cracks occur. The sheet shearing deformation at the edge brings about cracks. The strain rate changes periodically with different X. With initial width increases, the recrystallized grain size decreases. The finite element model has been validated by the experiment results.

Key words: Finite elements method, Magnesium alloys, Rolling, Pyramid sheet, Crack