Microstructural evolution in twin roll cast AA3105 during homogenization

Naiyu Sun; Burton R. Patterson; Jaakko P. Suni; Eider A. Simielli; Hasso Weiland; Lawrence F. Allard

doi:10.1016/j.msea.2005.10.018

Microstructural evolution in twin roll cast AA3105 during homogenization

Naiyu Sun, Burton R. Patterson, Jaakko P. Suni, Eider A. Simielli, Hasso Weiland, Lawrence F. Allard

Nuclear Energy Materials Microanalysis

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

82 Scopus citations

Abstract

In twin roll cast (TRC) AA3105, high solidification and post-solidification cooling rates lead to high manganese supersaturation throughout the strip and very fine constituent particles near the surface. Rolled and annealed TRC material shows sluggish recrystallization kinetics and a very coarse grain structure, due to concurrent dispersoid precipitation that inhibits formation of recrystallization nuclei. Homogenization from 5 to 120 h at 600 °C reduced solute supersaturation and coarsened constituent particles, reducing but not eliminating the particle size gradient. The resulting grain structure was fine throughout most of the strip, but with larger grains at the surface. More extensive cyclical homogenization up to 620 °C further coarsened the constituent particles and produced a uniform fine grain structure throughout the strip.

Original language	English
Pages (from-to)	232-239
Number of pages	8
Journal	Materials Science and Engineering: A
Volume	416
Issue number	1-2
DOIs	https://doi.org/10.1016/j.msea.2005.10.018
State	Published - Jan 25 2006

Funding

The authors gratefully acknowledge funding of this research by the Department of Energy, award number: DE-FC36-021D14401. The electron microscopy studies were sponsored by the Assistant Secretary for Energy Efficiency and Renewable Energy, Office of Transportation Technologies, as part of the High Temperature Materials Laboratory User Program, Oak Ridge National Laboratory, managed by UT-Battelle, LLC, for the U.S. Department of Energy under contract number DE-AC05-00OR22725.

Funders	Funder number
Office of Transportation Technologies
Secretary for Energy Efficiency and Renewable Energy
U.S. Department of Energy	DE-AC05-00OR22725, DE-FC36-021D14401
Oak Ridge National Laboratory

Keywords

Aluminum alloy
Homogenization
Microstructural evolution
Recrystallization
Twin roll casting

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10.1016/j.msea.2005.10.018

Cite this

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title = "Microstructural evolution in twin roll cast AA3105 during homogenization",

abstract = "In twin roll cast (TRC) AA3105, high solidification and post-solidification cooling rates lead to high manganese supersaturation throughout the strip and very fine constituent particles near the surface. Rolled and annealed TRC material shows sluggish recrystallization kinetics and a very coarse grain structure, due to concurrent dispersoid precipitation that inhibits formation of recrystallization nuclei. Homogenization from 5 to 120 h at 600 °C reduced solute supersaturation and coarsened constituent particles, reducing but not eliminating the particle size gradient. The resulting grain structure was fine throughout most of the strip, but with larger grains at the surface. More extensive cyclical homogenization up to 620 °C further coarsened the constituent particles and produced a uniform fine grain structure throughout the strip.",

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AU - Sun, Naiyu

AU - Patterson, Burton R.

AU - Suni, Jaakko P.

AU - Simielli, Eider A.

AU - Weiland, Hasso

AU - Allard, Lawrence F.

PY - 2006/1/25

Y1 - 2006/1/25

N2 - In twin roll cast (TRC) AA3105, high solidification and post-solidification cooling rates lead to high manganese supersaturation throughout the strip and very fine constituent particles near the surface. Rolled and annealed TRC material shows sluggish recrystallization kinetics and a very coarse grain structure, due to concurrent dispersoid precipitation that inhibits formation of recrystallization nuclei. Homogenization from 5 to 120 h at 600 °C reduced solute supersaturation and coarsened constituent particles, reducing but not eliminating the particle size gradient. The resulting grain structure was fine throughout most of the strip, but with larger grains at the surface. More extensive cyclical homogenization up to 620 °C further coarsened the constituent particles and produced a uniform fine grain structure throughout the strip.

AB - In twin roll cast (TRC) AA3105, high solidification and post-solidification cooling rates lead to high manganese supersaturation throughout the strip and very fine constituent particles near the surface. Rolled and annealed TRC material shows sluggish recrystallization kinetics and a very coarse grain structure, due to concurrent dispersoid precipitation that inhibits formation of recrystallization nuclei. Homogenization from 5 to 120 h at 600 °C reduced solute supersaturation and coarsened constituent particles, reducing but not eliminating the particle size gradient. The resulting grain structure was fine throughout most of the strip, but with larger grains at the surface. More extensive cyclical homogenization up to 620 °C further coarsened the constituent particles and produced a uniform fine grain structure throughout the strip.

KW - Aluminum alloy

KW - Homogenization

KW - Microstructural evolution

KW - Recrystallization

KW - Twin roll casting

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Microstructural evolution in twin roll cast AA3105 during homogenization

Abstract

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Keywords

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