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


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.


Recrystallization Subgrain Boundary Lower Heating Rate Direct Chill Hold Temperature 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



The authors gratefully acknowledge research funding by the Department of Energy Grant No. DE-FC36-02ID14401 and the support from the Assistant Secretary for Energy Efficiency and Renewable Energy, Office of Industrial Technologies, Advanced Industrial Materials Program, under Contract No. DE-AC05-00OR22725 with UT–Battelle, LLC.


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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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