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Thermo-mechanical Simulation of Warm Rolling of 6061 Al Alloy Using Finite Element and Upper Bound Methods

Sayadi, Hamed | 2012

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 43951 (07)
  4. University: Sharif University of Technology
  5. Department: Materials Science and Engineering
  6. Advisor(s): Serajzadeh, Siamak
  7. Abstract:
  8. In this research, temperature distribution and roll force during steady state warm and hot rolling of 6061 Al alloy strip have been simulated, using finite element method and upper bound solution. At first, the velocity field and deformation zone shape have been determined, by means of upper bound solution, then using 2D finite element method, the temperature distribution within rolling and considering rate of heat of deformation, has been calculated. This model generalized for two pass steady state warm and hot rolling. Also, in order to evaluate the predictions, the experimental recorded of temperature variation, during hot rolling and temperature variation predicted by model has been compared. The model result revealed that for continuous two pass rolling of 6061 Al Alloy strip with initial temperature of 4900C, the surface temperature of first and second work-rolls reaches to 2500C and 1800C respectively. While the temperature distribution 5 mm under surface of work-rolls shows trivial changes. Furthermore, mechanical and microstructure evaluations demonstrate that the temperature distribution at the exit position of the last rolling, total amount of reduction and cooling type play an important role on final mechanical property as well as aging behavior of the rolled alloy
  9. Keywords:
  10. Steady State ; Hot Rolling ; Finite Element Method ; Upper Bound Method

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