Superior strength-ductility synergy in ultrafine-grained Al–5Mg alloy
In this study, a comprehensive investigation was conducted for the first time to systematically explore the impact of deformation-heat treatment (DHT) on the microstructure and mechanical properties of ultrafine-grained (UFG) Al–5Mg (wt.%) alloy. The UFG structure was formed by high pressure torsion...
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Elsevier
2025-01-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785424030539 |
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| author | Aydar M. Mavlyutov Demid A. Kirilenko Aleksandr A. Levin Maxim Yu. Murashkin Dinislam I. Sadykov Tatiana S. Orlova |
| author_facet | Aydar M. Mavlyutov Demid A. Kirilenko Aleksandr A. Levin Maxim Yu. Murashkin Dinislam I. Sadykov Tatiana S. Orlova |
| author_sort | Aydar M. Mavlyutov |
| collection | DOAJ |
| description | In this study, a comprehensive investigation was conducted for the first time to systematically explore the impact of deformation-heat treatment (DHT) on the microstructure and mechanical properties of ultrafine-grained (UFG) Al–5Mg (wt.%) alloy. The UFG structure was formed by high pressure torsion (HPT) at room temperature (RT). The proposed DHT of the UFG alloy includes annealing at 150–230 °C and additional deformation by HPT at RT to 0.25–0.75 turns. As was demonstrated, annealing does not lead to an increase in the ductility of the UFG alloy, and subsequent additional deformation leads to the manifestation of the effect of deformation-induced softening: ductility increases from <1% to ∼5.5% while maintaining high strength (∼725 MPa). The resulting combination of strength and ductility significantly exceeds those reported for the other UFG Al–Mg alloy with comparable Mg concentrations, which were structured and treated by different methods. It was shown for the first time that annealing at 230 °C increases the degree of Mg segregation at grain boundaries and forms Mg-rich zones in triple junctions, and the subsequent small additional deformation does not significantly affect these parameters. Based on the microstructural changes during the DHT process, the physical reasons for the outstanding combination of strength and ductility are analyzed. |
| format | Article |
| id | doaj-art-d090707746254e9a90e8b4645e859944 |
| institution | Kabale University |
| issn | 2238-7854 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj-art-d090707746254e9a90e8b4645e8599442025-01-19T06:25:58ZengElsevierJournal of Materials Research and Technology2238-78542025-01-013423292343Superior strength-ductility synergy in ultrafine-grained Al–5Mg alloyAydar M. Mavlyutov0Demid A. Kirilenko1Aleksandr A. Levin2Maxim Yu. Murashkin3Dinislam I. Sadykov4Tatiana S. Orlova5Ioffe Institute, Politekhnicheskaya Str. 26, St. Petersburg, 194021, RussiaIoffe Institute, Politekhnicheskaya Str. 26, St. Petersburg, 194021, RussiaIoffe Institute, Politekhnicheskaya Str. 26, St. Petersburg, 194021, RussiaIoffe Institute, Politekhnicheskaya Str. 26, St. Petersburg, 194021, Russia; Ufa University of Science and Technology, Zaki Validi Str. 32, Ufa, 450076, RussiaIoffe Institute, Politekhnicheskaya Str. 26, St. Petersburg, 194021, Russia; ITMO University, Kronverksky Pr. 49, St. Petersburg, 197101, RussiaIoffe Institute, Politekhnicheskaya Str. 26, St. Petersburg, 194021, Russia; Corresponding author.In this study, a comprehensive investigation was conducted for the first time to systematically explore the impact of deformation-heat treatment (DHT) on the microstructure and mechanical properties of ultrafine-grained (UFG) Al–5Mg (wt.%) alloy. The UFG structure was formed by high pressure torsion (HPT) at room temperature (RT). The proposed DHT of the UFG alloy includes annealing at 150–230 °C and additional deformation by HPT at RT to 0.25–0.75 turns. As was demonstrated, annealing does not lead to an increase in the ductility of the UFG alloy, and subsequent additional deformation leads to the manifestation of the effect of deformation-induced softening: ductility increases from <1% to ∼5.5% while maintaining high strength (∼725 MPa). The resulting combination of strength and ductility significantly exceeds those reported for the other UFG Al–Mg alloy with comparable Mg concentrations, which were structured and treated by different methods. It was shown for the first time that annealing at 230 °C increases the degree of Mg segregation at grain boundaries and forms Mg-rich zones in triple junctions, and the subsequent small additional deformation does not significantly affect these parameters. Based on the microstructural changes during the DHT process, the physical reasons for the outstanding combination of strength and ductility are analyzed.http://www.sciencedirect.com/science/article/pii/S2238785424030539Ultrafine-grained materialsAluminum-magnesium alloyMechanical propertiesDeformation-heat treatmentDeformation-induced softeningMicrostructure evolution |
| spellingShingle | Aydar M. Mavlyutov Demid A. Kirilenko Aleksandr A. Levin Maxim Yu. Murashkin Dinislam I. Sadykov Tatiana S. Orlova Superior strength-ductility synergy in ultrafine-grained Al–5Mg alloy Journal of Materials Research and Technology Ultrafine-grained materials Aluminum-magnesium alloy Mechanical properties Deformation-heat treatment Deformation-induced softening Microstructure evolution |
| title | Superior strength-ductility synergy in ultrafine-grained Al–5Mg alloy |
| title_full | Superior strength-ductility synergy in ultrafine-grained Al–5Mg alloy |
| title_fullStr | Superior strength-ductility synergy in ultrafine-grained Al–5Mg alloy |
| title_full_unstemmed | Superior strength-ductility synergy in ultrafine-grained Al–5Mg alloy |
| title_short | Superior strength-ductility synergy in ultrafine-grained Al–5Mg alloy |
| title_sort | superior strength ductility synergy in ultrafine grained al 5mg alloy |
| topic | Ultrafine-grained materials Aluminum-magnesium alloy Mechanical properties Deformation-heat treatment Deformation-induced softening Microstructure evolution |
| url | http://www.sciencedirect.com/science/article/pii/S2238785424030539 |
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