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<p>The effects of different overaging temperatures and times prior to the rolling portion of a thermomechanical process (TMP) were examined to determine those combinations resulting in refined microstructures capable of supporting superplastic behavior. Specimens of processed Al 2519 were tension tested at elevated temperatures after varying TMP parameters. Enhanced ductility in comparison to unprocessed material was observed at all test temperatures in the range of 3OO-45O0C. Moderate superplastic ductilities (up to 300%) were encountered under some conditions. Backscattered electron imaging techniques coupled with quantitative microstructural analysis methods were used to examine both processed and deformed samples. The correlations among processing, microstructure and mechanical behavior are presented.
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<br>Subjects:</div>
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Peet, Benjamin Braman.</div>
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