Metallurgical and Materials Transactions A

, Volume 39, Issue 1, pp 165–170 | Cite as

Effect of Heating Rate on Recrystallization of Twin Roll Cast Aluminum

  • Naiyu Sun
  • Burton R. Patterson
  • Jaakko P. Suni
  • Roger D. Doherty
  • Hasso Weiland
  • Puja Kadolkar
  • Craig A. Blue
  • Gregory B. Thompson
Article

Abstract

The effect of heating rate on precipitation and recrystallization behavior in twin roll cast (TRC) AA3105 has been investigated by three different means: conventional air furnace, controlled infrared, and lead bath heating. Experimental results showed that as-recrystallized grain size decreased and became more equiaxed as the annealing heating rate increased. These results were explained via time-temperature-transformation (TTT) curves for both dispersoid precipitation and recrystallization. With the faster heating rate, recrystallization could occur before precipitation of Mn present in the unhomogenized TRC samples. At a heating rate of 50 °C/s, the material underwent grain growth after recrystallization at 500 °C. No sign of grain growth was observed in materials annealed with lower heating rates, 3 °C/s, 0.5 °C/s, and 0.01 °C/s, due to greater dispersoid precipitation.

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Copyright information

© THE MINERALS, METALS & MATERIALS SOCIETY and ASM INTERNATIONAL 2007

Authors and Affiliations

  • Naiyu Sun
    • 1
    • 2
  • Burton R. Patterson
    • 1
  • Jaakko P. Suni
    • 3
  • Roger D. Doherty
    • 4
  • Hasso Weiland
    • 3
  • Puja Kadolkar
    • 5
  • Craig A. Blue
    • 5
  • Gregory B. Thompson
    • 6
  1. 1.Department of Materials Science and EngineeringUniversity of Alabama at BirminghamBirminghamUSA
  2. 2.Citation CorporationBrowntownUSA
  3. 3.Alcoa Technical CenterAlcoa CenterUSA
  4. 4.Drexel UniversityPhiladelphiaUSA
  5. 5.Department of Materials EngineeringOak Ridge National LaboratoryOak RidgeUSA
  6. 6.Department of Metallurgical and Materials EngineeringUniversity of AlabamaTuscaloosaUSA

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