Microstructure and Mechanical Properties of Al-4Mg-0.3Cu Alloy after HPT and Postdeformation Annealing
The effects of different strain levels applied through high-pressure torsion (HPT) deformation following annealing on the microstructural evolution, thermal stability, and mechanical properties of Al-4Mg-0.3Cu alloy were investigated. The results reveal that Cu-segregated grain boundaries (GBs) were...
| Main Authors: | , , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2023-04-01
|
| Series: | Metals |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2075-4701/13/4/810 |
| _version_ | 1797604293535072256 |
|---|---|
| author | Xiaohui Yang Chao Gao Tingting Ku Wenlu Yang Yanping Guo Linzeng Wang Huiqin Chen Xiaofeng Li Rujie Hu Jianyu Cui |
| author_facet | Xiaohui Yang Chao Gao Tingting Ku Wenlu Yang Yanping Guo Linzeng Wang Huiqin Chen Xiaofeng Li Rujie Hu Jianyu Cui |
| author_sort | Xiaohui Yang |
| collection | DOAJ |
| description | The effects of different strain levels applied through high-pressure torsion (HPT) deformation following annealing on the microstructural evolution, thermal stability, and mechanical properties of Al-4Mg-0.3Cu alloy were investigated. The results reveal that Cu-segregated grain boundaries (GBs) were generated in the ultrafine-grained Al-4Mg-0.3Cu alloy with high angle grain boundaries. By contrast, the phenomenon of Cu segregation was not found in micron-scale and submicron-scale grains with low-angle grain boundaries. The mechanism of Cu segregation in ultrafine-grained Al-4Mg-0.3Cu alloy was discussed. After heat treatment, Cu segregation induced the precipitation of the dense Al<sub>2</sub>CuMg phase at GBs, which strongly inhibit grain growth and improve thermal stability. Stress–strain curves of as-cast, 5-turn, and 10-turn HPT samples showed that fracture strength significantly increased, attributed to grain size refinement, dislocation density increase, and Cu segregation at GBs. After heat treatment, 5-turn and 10-turn HPT samples demonstrate an enhanced elongation to fracture with a slight reduction of fracture strength. |
| first_indexed | 2024-03-11T04:44:22Z |
| format | Article |
| id | doaj.art-29f04560ff2c48fe9c76231acd32b3b8 |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-11T04:44:22Z |
| publishDate | 2023-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj.art-29f04560ff2c48fe9c76231acd32b3b82023-11-17T20:28:01ZengMDPI AGMetals2075-47012023-04-0113481010.3390/met13040810Microstructure and Mechanical Properties of Al-4Mg-0.3Cu Alloy after HPT and Postdeformation AnnealingXiaohui Yang0Chao Gao1Tingting Ku2Wenlu Yang3Yanping Guo4Linzeng Wang5Huiqin Chen6Xiaofeng Li7Rujie Hu8Jianyu Cui9Shanxi Heavy Casting and Forging Engineering Technology Research Centre, Taiyuan University of Science and Technology, Taiyuan 030024, ChinaShanxi Heavy Casting and Forging Engineering Technology Research Centre, Taiyuan University of Science and Technology, Taiyuan 030024, ChinaCollege of Environmental and Resource Science, Shanxi University, Taiyuan 030006, ChinaShanxi Heavy Casting and Forging Engineering Technology Research Centre, Taiyuan University of Science and Technology, Taiyuan 030024, ChinaShanxi Heavy Casting and Forging Engineering Technology Research Centre, Taiyuan University of Science and Technology, Taiyuan 030024, ChinaSchool of Materials Science and Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, ChinaShanxi Heavy Casting and Forging Engineering Technology Research Centre, Taiyuan University of Science and Technology, Taiyuan 030024, ChinaSchool of Materials Science and Engineering, North University of China, Taiyuan 030051, ChinaSchool of Materials Science and Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, ChinaSchool of Materials Science and Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, ChinaThe effects of different strain levels applied through high-pressure torsion (HPT) deformation following annealing on the microstructural evolution, thermal stability, and mechanical properties of Al-4Mg-0.3Cu alloy were investigated. The results reveal that Cu-segregated grain boundaries (GBs) were generated in the ultrafine-grained Al-4Mg-0.3Cu alloy with high angle grain boundaries. By contrast, the phenomenon of Cu segregation was not found in micron-scale and submicron-scale grains with low-angle grain boundaries. The mechanism of Cu segregation in ultrafine-grained Al-4Mg-0.3Cu alloy was discussed. After heat treatment, Cu segregation induced the precipitation of the dense Al<sub>2</sub>CuMg phase at GBs, which strongly inhibit grain growth and improve thermal stability. Stress–strain curves of as-cast, 5-turn, and 10-turn HPT samples showed that fracture strength significantly increased, attributed to grain size refinement, dislocation density increase, and Cu segregation at GBs. After heat treatment, 5-turn and 10-turn HPT samples demonstrate an enhanced elongation to fracture with a slight reduction of fracture strength.https://www.mdpi.com/2075-4701/13/4/810Al-4Mg-0.3Cu alloyhigh-pressure torsionmicrostructural evolutionthermal stabilitymechanical properties |
| spellingShingle | Xiaohui Yang Chao Gao Tingting Ku Wenlu Yang Yanping Guo Linzeng Wang Huiqin Chen Xiaofeng Li Rujie Hu Jianyu Cui Microstructure and Mechanical Properties of Al-4Mg-0.3Cu Alloy after HPT and Postdeformation Annealing Metals Al-4Mg-0.3Cu alloy high-pressure torsion microstructural evolution thermal stability mechanical properties |
| title | Microstructure and Mechanical Properties of Al-4Mg-0.3Cu Alloy after HPT and Postdeformation Annealing |
| title_full | Microstructure and Mechanical Properties of Al-4Mg-0.3Cu Alloy after HPT and Postdeformation Annealing |
| title_fullStr | Microstructure and Mechanical Properties of Al-4Mg-0.3Cu Alloy after HPT and Postdeformation Annealing |
| title_full_unstemmed | Microstructure and Mechanical Properties of Al-4Mg-0.3Cu Alloy after HPT and Postdeformation Annealing |
| title_short | Microstructure and Mechanical Properties of Al-4Mg-0.3Cu Alloy after HPT and Postdeformation Annealing |
| title_sort | microstructure and mechanical properties of al 4mg 0 3cu alloy after hpt and postdeformation annealing |
| topic | Al-4Mg-0.3Cu alloy high-pressure torsion microstructural evolution thermal stability mechanical properties |
| url | https://www.mdpi.com/2075-4701/13/4/810 |
| work_keys_str_mv | AT xiaohuiyang microstructureandmechanicalpropertiesofal4mg03cualloyafterhptandpostdeformationannealing AT chaogao microstructureandmechanicalpropertiesofal4mg03cualloyafterhptandpostdeformationannealing AT tingtingku microstructureandmechanicalpropertiesofal4mg03cualloyafterhptandpostdeformationannealing AT wenluyang microstructureandmechanicalpropertiesofal4mg03cualloyafterhptandpostdeformationannealing AT yanpingguo microstructureandmechanicalpropertiesofal4mg03cualloyafterhptandpostdeformationannealing AT linzengwang microstructureandmechanicalpropertiesofal4mg03cualloyafterhptandpostdeformationannealing AT huiqinchen microstructureandmechanicalpropertiesofal4mg03cualloyafterhptandpostdeformationannealing AT xiaofengli microstructureandmechanicalpropertiesofal4mg03cualloyafterhptandpostdeformationannealing AT rujiehu microstructureandmechanicalpropertiesofal4mg03cualloyafterhptandpostdeformationannealing AT jianyucui microstructureandmechanicalpropertiesofal4mg03cualloyafterhptandpostdeformationannealing |