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

doi:10.1007/s11661-007-9367-3

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

National Security Sciences Directorate

Research output: Contribution to journal › Article › peer-review

24 Scopus citations

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.

Original language	English
Pages (from-to)	165-170
Number of pages	6
Journal	Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
Volume	39
Issue number	1
DOIs	https://doi.org/10.1007/s11661-007-9367-3
State	Published - Jan 2008

Funding

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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title = "Effect of heating rate on recrystallization of twin roll cast aluminum",

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.",

author = "Naiyu Sun and Patterson, {Burton R.} and Suni, {Jaakko P.} and Doherty, {Roger D.} and Hasso Weiland and Puja Kadolkar and Blue, {Craig A.} and Thompson, {Gregory B.}",

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AU - Sun, Naiyu

AU - Patterson, Burton R.

AU - Suni, Jaakko P.

AU - Doherty, Roger D.

AU - Weiland, Hasso

AU - Kadolkar, Puja

AU - Blue, Craig A.

AU - Thompson, Gregory B.

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AB - 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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Effect of heating rate on recrystallization of twin roll cast aluminum

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