Effect of Initial Microstructure on the Hot Deformation Behavior and Microstructure Evolution of Aluminum Alloy AA2060
The microstructure evolution and hot deformation behavior of a Li-containing aluminum alloy AA2060 with different initial microstructure (homogenized vs. pre-rolled) were studied by isothermal hot deformation. The tests were performed within a wide range of deformation temperatures of 370–490 ℃ and...
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Veröffentlicht in: | Metals and materials international 2022, 28(7), , pp.1561-1574 |
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Hauptverfasser: | , , , , , , |
Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | The microstructure evolution and hot deformation behavior of a Li-containing aluminum alloy AA2060 with different initial microstructure (homogenized vs. pre-rolled) were studied by isothermal hot deformation. The tests were performed within a wide range of deformation temperatures of 370–490 ℃ and strain rates of 0.01–10 s
−1
. Results show that the stress drop ratio of the pre-rolled specimen is higher than that of the homogenized one under the same deformation condition. Microstructure were analyzed on the thermal processing maps in unstable and optimum processing domain, and a higher dynamic recrystallization fraction can be observed in the pre-rolled specimen that has more substructures and smaller grains. Four types of the dynamic recrystallization were observed and the mechanism for deformation softening was discussed in this work.
Graphic Abstract |
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ISSN: | 1598-9623 2005-4149 |
DOI: | 10.1007/s12540-021-01025-3 |