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Annealing Behavior of Solution Treated and Aged Al-0.2wt% Sc Deformed by ARB

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Abstract:

The effect of prior and subsequent precipitation on recrystallization behavior during the isothermal annealing of an Al-0.2%wt.Sc alloy heavily deformed by accumulative roll bonding (ARB) up to 10 cycles at ambient temperature was investigated. Three kind of different microstructures, i.e., solution treated one, 300°C pre-aged one and 400°C pre-aged one, were prepared as the starting structures for the ARB process. It is found that precipitation pinning effect of Al3Sc suppresses recrystallization and especially the 400°C pre-aging was effective to stabilize the ultrafine grained structure of the matrix. Dissolution of pre-aging Al3Sc precipitates was suggested by re-precipitation during annealing of the ARB processed specimens at around 300°C.

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Info:

Periodical:

Materials Science Forum (Volumes 667-669)

Pages:

211-216

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.667-669.211

Citation:

Cite this paper

Online since:

December 2010

Authors:

Ehsan Borhani, Hamidreza Jafarian, Hiroki Adachi, Daisuke Terada, Nobuhiro Tsuji

Keywords:

Accumulative Roll Bonding (ARB), Al-Sc, Precipitation, Recrystallization

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