Influence of Hot Deformation on the Precipitation Hardening of High-Strength Aluminum AA7075 during Thermo-Mechanical Processing
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 °...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-04-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/11/5/681 |
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| author | Emad Scharifi Daria Shoshmina Stefan Biegler Ursula Weidig Kurt Steinhoff |
| author_facet | Emad Scharifi Daria Shoshmina Stefan Biegler Ursula Weidig Kurt Steinhoff |
| author_sort | Emad Scharifi |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-03-10T12:07:46Z |
| format | Article |
| id | doaj.art-93c0629cd96342b38d6f27cbd49269da |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-10T12:07:46Z |
| publishDate | 2021-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj.art-93c0629cd96342b38d6f27cbd49269da2023-11-21T16:29:38ZengMDPI AGMetals2075-47012021-04-0111568110.3390/met11050681Influence of Hot Deformation on the Precipitation Hardening of High-Strength Aluminum AA7075 during Thermo-Mechanical ProcessingEmad Scharifi0Daria Shoshmina1Stefan Biegler2Ursula Weidig3Kurt Steinhoff4Metal Forming Technology, University of Kassel, Kurt-Wolters-Straße 3, 34125 Kassel, GermanyMetal Forming Technology, University of Kassel, Kurt-Wolters-Straße 3, 34125 Kassel, GermanyMetal Forming Technology, University of Kassel, Kurt-Wolters-Straße 3, 34125 Kassel, GermanyMetal Forming Technology, University of Kassel, Kurt-Wolters-Straße 3, 34125 Kassel, GermanyMetal Forming Technology, University of Kassel, Kurt-Wolters-Straße 3, 34125 Kassel, GermanyThe 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.https://www.mdpi.com/2075-4701/11/5/681thermo-mechanical processingprecipitation-dislocation hardeningrecrystallizationhigh strength aluminum alloyshot deformation |
| spellingShingle | Emad Scharifi Daria Shoshmina Stefan Biegler Ursula Weidig Kurt Steinhoff Influence of Hot Deformation on the Precipitation Hardening of High-Strength Aluminum AA7075 during Thermo-Mechanical Processing Metals thermo-mechanical processing precipitation-dislocation hardening recrystallization high strength aluminum alloys hot deformation |
| title | Influence of Hot Deformation on the Precipitation Hardening of High-Strength Aluminum AA7075 during Thermo-Mechanical Processing |
| title_full | Influence of Hot Deformation on the Precipitation Hardening of High-Strength Aluminum AA7075 during Thermo-Mechanical Processing |
| title_fullStr | Influence of Hot Deformation on the Precipitation Hardening of High-Strength Aluminum AA7075 during Thermo-Mechanical Processing |
| title_full_unstemmed | Influence of Hot Deformation on the Precipitation Hardening of High-Strength Aluminum AA7075 during Thermo-Mechanical Processing |
| title_short | Influence of Hot Deformation on the Precipitation Hardening of High-Strength Aluminum AA7075 during Thermo-Mechanical Processing |
| title_sort | influence of hot deformation on the precipitation hardening of high strength aluminum aa7075 during thermo mechanical processing |
| topic | thermo-mechanical processing precipitation-dislocation hardening recrystallization high strength aluminum alloys hot deformation |
| url | https://www.mdpi.com/2075-4701/11/5/681 |
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