Analysis of Surface Roughening in AA6111 Automotive Sheet Under Pure Bending

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• 作者：Y. Shi ; P. Z. Zhao ; H. Jin ; P. D. Wu…
• 刊名：Metallurgical and Materials Transactions A
• 出版年：2016
• 出版时间：February 2016
• 年：2016
• 卷：47
• 期：2
• 页码：949-960
• 全文大小：3,631 KB
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• 作者单位：Y. Shi (1)
  P. Z. Zhao (2)
  H. Jin (3)
  P. D. Wu (1)
  D. J. Lloyd (4)
  
  1. Department of Mechanical Engineering, McMaster University, 1280 Main Street West, Hamilton, ON, L8S 4L7, Canada
  2. CHINALCO Research Institute of Science and Technology, 62 Xizhimen North Street, Beijing, 100082, China
  3. CanmetMATERIALS, Natural Resources Canada, 183 Longwood Road South, Hamilton, ON, L8P 0A5, Canada
  4. Aluminum Materials Consultants, 106 Nicholsons Point Road, Bath, ON, K0H 1G0, Canada
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Materials Science
  Metallic Materials
  Structural Materials
  Physical Chemistry
  Ceramics,Glass,Composites,Natural Materials
  
• 出版者：Springer Boston
• ISSN：1543-1940

文摘

The finite element method is used to numerically simulate the topographic development in an aluminum sheet, AA6111, under pure bending. The measured electron backscatter diffraction data are directly incorporated into the finite element model, and the constitutive response at an integration point is described by the single crystal plasticity theory. The effects of strain-rate sensitivity, work hardening, and imposed initial surface roughness on surface roughening are studied. It is found that the grains in top surface layers of the sheet play a big role in controlling the outer surface roughness due to the strain gradient across sheet thickness in bending, while the grain size and texture of the surface layers have a direct impact on finishing surface qualities.