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

• Research paper • Previous Articles    

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

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