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Date
2021-04-21Subject
620 Engineering 660 Chemical engineering 670 Manufacturing AluminiumlegierungDeformationAusscheidungThermomechanische EigenschaftMetadata
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Aufsatz
Influence of hot deformation on the precipitation hardening of high-strength aluminum AA7075 during thermo-mechanical processing
Abstract
The aim of this work was to investigate the effect of hot deformation on the aging behavior of precipitation-hardenable aluminum alloy AA7075 within a novel thermo-mechanical forming process, in order to gain insight into its precipitation kinetics. For this purpose, the material was formed at 420 °C after undergoing solution treatment to different strain levels ranging from 2% to 10% to obtain different dislocation densities. After undergoing hot deformation, aging at 120 °C with different parameters was carried out to improve the material hardness. The resulting material properties and microstructure evolution were characterized afterward using hardness measurements and a transmission electron microscope (TEM). TEM investigations revealed the formation of very fine particles for the material formed at 2%, as well as at 10%, of formed material, which act as effective barriers to dislocation motion. It was found that the response of artificial aging on the deformation degree in hot forming was less than expected due to the thermally activated mechanisms, leading to a decrease in dislocation density. Therefore, a dramatic increase in material hardness with the increase in hot deformation was not observed.
Citation
In: Metals Volume 11 / Issue 5 (2021-04-21) EISSN 2075-4701Sponsorship
Gefördert durch den Publikationsfonds der Universität KasselCitation
@article{doi:10.17170/kobra-202104303785,
author={Scharifi, Emad and Shoshmina, Daria and Biegler, Stefan and Weidig, Ursula and Steinhoff, Kurt},
title={Influence of hot deformation on the precipitation hardening of high-strength aluminum AA7075 during thermo-mechanical processing},
journal={Metals},
year={2021}
}
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2021-04-30T08:33:22Z 2021-04-30T08:33:22Z 2021-04-21 doi:10.17170/kobra-202104303785 http://hdl.handle.net/123456789/12762 Gefördert durch den Publikationsfonds der Universität Kassel eng Namensnennung 4.0 International http://creativecommons.org/licenses/by/4.0/ thermo-mechanical processing precipitation-dislocation hardening recrystallization high strength aluminum alloys hot deformation 620 660 670 Influence of hot deformation on the precipitation hardening of high-strength aluminum AA7075 during thermo-mechanical processing Aufsatz The aim of this work was to investigate the effect of hot deformation on the aging behavior of precipitation-hardenable aluminum alloy AA7075 within a novel thermo-mechanical forming process, in order to gain insight into its precipitation kinetics. For this purpose, the material was formed at 420 °C after undergoing solution treatment to different strain levels ranging from 2% to 10% to obtain different dislocation densities. After undergoing hot deformation, aging at 120 °C with different parameters was carried out to improve the material hardness. The resulting material properties and microstructure evolution were characterized afterward using hardness measurements and a transmission electron microscope (TEM). TEM investigations revealed the formation of very fine particles for the material formed at 2%, as well as at 10%, of formed material, which act as effective barriers to dislocation motion. It was found that the response of artificial aging on the deformation degree in hot forming was less than expected due to the thermally activated mechanisms, leading to a decrease in dislocation density. Therefore, a dramatic increase in material hardness with the increase in hot deformation was not observed. open access Scharifi, Emad Shoshmina, Daria Biegler, Stefan Weidig, Ursula Steinhoff, Kurt doi:10.3390/met11050681 Aluminiumlegierung Deformation Ausscheidung Thermomechanische Eigenschaft publishedVersion EISSN 2075-4701 Issue 5 Metals Volume 11 false 681
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