The role of hot-working on the microstructure and mechanical properties of the L12-type manganese-modified Al3Ti alloy

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DOIResolve DOI: http://doi.org/10.1016/0921-5093(92)90222-M
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TypeArticle
Proceedings titleProceedings of the Second International ASM Conference on High Temperature Aluminides and Intermetallics: Part 2
Series titleMaterials Science and Engineering: A
ConferenceSecond International ASM Conference on High Temperature Aluminides and Intermetallics, September 16-19, 1991, San Diego, USA
ISSN0921-5093
Volume153
Issue1-2
Pages370376; # of pages: 7
AbstractThe crystal structure of a manganese-modified Al3Ti intermetallic alloy has been changed from the tetragonal D022 to the L12 cubic structure. The cast alloy shows considerable compression ductility at room temperature. To improve its mechanical properties further, hot-working experiments have been conducted. The results showed that the Al67Mn8Ti25 intermetallic alloy maintains very good hot-workability, the cast alloy can be reduced 60% by a single hot-pressing stroke without cracking. The role of hot-working on the microstructure and the mechanical properties of the alloy have been studied. It was found that the hot-worked alloy shows a deformed structure and some work-hardening after hot-working. Experiments indicated that the starting temperature for recrystallization is about 1173 K and complete recrystallization of the deformed alloy occurs at about 1273 K. Good hot-workability and a high recrystallization temperature permit potential for elevated temperature use. A transmission electron microscopy study on the evolution of dislocation structures in the recovery and recrystallization processes is also reported.
Publication date
PublisherElsevier
LanguageEnglish
Peer reviewedYes
NPARC number21277140
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Record identifieraf08140e-afae-4ad5-ba77-3ffe77a5ae07
Record created2015-12-16
Record modified2016-05-09
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