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Prediction of Temperature and Strain Distribution in the Warm Rolling of Austenite Stainless Steel

Nemati, Elham | 2012

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 43647 (07)
  4. University: Sharif University of Technology
  5. Department: Materials Science and Engineering
  6. Advisor(s): Serajzadeh, Siamak
  7. Abstract:
  8. In this research, the hot and warm rolling of stainless steel 304 was studied. First the rolling process was simulated using Finite Element Method software ABAQUS and the distribution of temperature and strain in the process under discontinuous conditions were predicted. Next, hot and warm rolling of stainless steel 304 under different conditions was carried out. Specimens were cut and subject to mechanical testing, metallography and electron microscopic studies. Data obtained from these experiments and the predicted trends from ABAQUS were compared, therefore studying the effect of different parameters on the microstructure and mechanical properties of the rolled specimen. Results indicate that of all parameters influencing the process, the speed of the rollers does not have a significant effect on mechanical properties. Ageing was another matter of importance studied. Some specimens were aged in the first hours after the rolling process while others were aged over a longer period of time and some were not aged at all. The cooling rate was shown to have a significant role on the occurence of ageing and the mechanism of it. Yield stress and ultimate tensile strength of some specimens were shown to undergo a change. These phenomena were carefully studied and the hypotheses were proposed for them
  9. Keywords:
  10. 304 Austenitic Stainless Steel ; Hot Rolling ; Warm Rolling ; Recrystallization ; Mechanical Test ; Simulation

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