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
Hauptverfasser: Li, Chaoyang, Huang, Guangjie, Cao, Lingfei, Zhang, Ruoxi, Cao, Yu, Liao, Bin, Lin, Lin
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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
ISSN:1598-9623
2005-4149
DOI:10.1007/s12540-021-01025-3