Date
2021-07-20Author
Sajadifar, Seyed VahidKrooß, PhilippFröck, HannesMilkereit, BenjaminKessler, OlafNiendorf, ThomasSubject
670 Manufacturing SpannungsfreiglühenDifferential scanning calorimetryWärmebehandlungAluminiumlegierungMetadata
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Aufsatz
Effects of Aging under Stress on Mechanical Properties and Microstructure of EN AW 7075 Alloy
Abstract
In the present study, microstructural and mechanical properties of EN AW 7075 following stress-aging were assessed. For this purpose, properties of stress-aged samples were compared with values obtained for conventionally aged counterparts. It is revealed that the strength and hardness of EN AW 7075 can be increased by the presence of external stresses during aging. Precipitation kinetics were found to be accelerated. The effects of conventional and stress-aging on the microstructure were analyzed using synergetic techniques: the differently aged samples were probed by differential scanning calorimetry (DSC) in order to characterize the precipitation processes. DSC was found to be an excellent screening tool for the analysis of precipitation processes during aging of this alloy with and without the presence of external stresses. Furthermore, using electron microscopy it was revealed that an improvement in mechanical properties can be correlated to changes in the morphologies and sizes of precipitates formed.
Citation
In: Metals Volume 11 / Issue 7 (2021-07-20) eissn:2075-4701Citation
@article{doi:10.17170/kobra-202304247886,
author={Sajadifar, Seyed Vahid and Krooß, Philipp and Fröck, Hannes and Milkereit, Benjamin and Kessler, Olaf and Niendorf, Thomas},
title={Effects of Aging under Stress on Mechanical Properties and Microstructure of EN AW 7075 Alloy},
journal={Metals},
year={2021}
}
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2023-04-24T09:41:38Z 2023-04-24T09:41:38Z 2021-07-20 doi:10.17170/kobra-202304247886 http://hdl.handle.net/123456789/14623 eng Namensnennung 4.0 International http://creativecommons.org/licenses/by/4.0/ high strength aluminum alloy stress-aging DSC heat treatment thermo-mechanical treatment 670 Effects of Aging under Stress on Mechanical Properties and Microstructure of EN AW 7075 Alloy Aufsatz In the present study, microstructural and mechanical properties of EN AW 7075 following stress-aging were assessed. For this purpose, properties of stress-aged samples were compared with values obtained for conventionally aged counterparts. It is revealed that the strength and hardness of EN AW 7075 can be increased by the presence of external stresses during aging. Precipitation kinetics were found to be accelerated. The effects of conventional and stress-aging on the microstructure were analyzed using synergetic techniques: the differently aged samples were probed by differential scanning calorimetry (DSC) in order to characterize the precipitation processes. DSC was found to be an excellent screening tool for the analysis of precipitation processes during aging of this alloy with and without the presence of external stresses. Furthermore, using electron microscopy it was revealed that an improvement in mechanical properties can be correlated to changes in the morphologies and sizes of precipitates formed. open access Sajadifar, Seyed Vahid Krooß, Philipp Fröck, Hannes Milkereit, Benjamin Kessler, Olaf Niendorf, Thomas 15 Seiten doi:10.3390/met11071142 Spannungsfreiglühen Differential scanning calorimetry Wärmebehandlung Aluminiumlegierung publishedVersion eissn:2075-4701 Issue 7 Metals Volume 11 false 1142
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