Effect of over-aging on the microstructure, mechanical properties and crashing performance of thin-walled Al–Mg–Si–Cu alloy profiles
The thin-walled Al–Mg–Si–Cu alloy (AA6008) crash-box profiles were treated by over-aging at 215 °C for 60 min, 120 min and 300 min, and then their corresponding microstructure, mechanical properties, and crashing performance were investigated. The results show that with the increase of aging time, t...
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| Format: | Article |
| Language: | English |
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Elsevier
2022-11-01
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| Series: | Journal of Materials Research and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785422016763 |
| _version_ | 1811293061939986432 |
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| author | G.D. Jiang Y.H. Cai C. Qiu W.W. Zhang D.T. Zhang |
| author_facet | G.D. Jiang Y.H. Cai C. Qiu W.W. Zhang D.T. Zhang |
| author_sort | G.D. Jiang |
| collection | DOAJ |
| description | The thin-walled Al–Mg–Si–Cu alloy (AA6008) crash-box profiles were treated by over-aging at 215 °C for 60 min, 120 min and 300 min, and then their corresponding microstructure, mechanical properties, and crashing performance were investigated. The results show that with the increase of aging time, the number density of precipitation is decreased significantly, the size of precipitate is coarsened, and the precipitate type is transformed from β″ to β′, resulting in a reduction of microhardness and strength. The crashed morphology of the profile is improved showing a more regular folding deformation and less crack, but the corresponding values of energy absorption and mean crash force are decreased owing to the decrease of the strength. The medium overaged treatment, i.e., AA 215 °C-120 min sample, can obtain a balanced combination of excellent mechanical properties (yield strength > 280 MPa) and crashing performance. The influence of precipitation on the mechanical properties and crash deformation is also discussed based on experimental results. |
| first_indexed | 2024-04-13T04:55:48Z |
| format | Article |
| id | doaj.art-0ee3a36026fb43f0bc0ad64531c16fd8 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-04-13T04:55:48Z |
| publishDate | 2022-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-0ee3a36026fb43f0bc0ad64531c16fd82022-12-22T03:01:29ZengElsevierJournal of Materials Research and Technology2238-78542022-11-012130743085Effect of over-aging on the microstructure, mechanical properties and crashing performance of thin-walled Al–Mg–Si–Cu alloy profilesG.D. Jiang0Y.H. Cai1C. Qiu2W.W. Zhang3D.T. Zhang4Guangdong Key Laboratory for Advanced Metallic Materials Processing and Forming, National Engineering Research Center of Near-net-shape Forming for Metallic Materials, South China University of Technology, Guangzhou, 510640, ChinaGuangdong Key Laboratory for Advanced Metallic Materials Processing and Forming, National Engineering Research Center of Near-net-shape Forming for Metallic Materials, South China University of Technology, Guangzhou, 510640, China; Guangdong King Metal Light Alloy Technology Co., Ltd., Qingcheng District, Qingyuan, 511500, ChinaGuangdong Key Laboratory for Advanced Metallic Materials Processing and Forming, National Engineering Research Center of Near-net-shape Forming for Metallic Materials, South China University of Technology, Guangzhou, 510640, ChinaGuangdong Key Laboratory for Advanced Metallic Materials Processing and Forming, National Engineering Research Center of Near-net-shape Forming for Metallic Materials, South China University of Technology, Guangzhou, 510640, ChinaGuangdong Key Laboratory for Advanced Metallic Materials Processing and Forming, National Engineering Research Center of Near-net-shape Forming for Metallic Materials, South China University of Technology, Guangzhou, 510640, China; Corresponding author.The thin-walled Al–Mg–Si–Cu alloy (AA6008) crash-box profiles were treated by over-aging at 215 °C for 60 min, 120 min and 300 min, and then their corresponding microstructure, mechanical properties, and crashing performance were investigated. The results show that with the increase of aging time, the number density of precipitation is decreased significantly, the size of precipitate is coarsened, and the precipitate type is transformed from β″ to β′, resulting in a reduction of microhardness and strength. The crashed morphology of the profile is improved showing a more regular folding deformation and less crack, but the corresponding values of energy absorption and mean crash force are decreased owing to the decrease of the strength. The medium overaged treatment, i.e., AA 215 °C-120 min sample, can obtain a balanced combination of excellent mechanical properties (yield strength > 280 MPa) and crashing performance. The influence of precipitation on the mechanical properties and crash deformation is also discussed based on experimental results.http://www.sciencedirect.com/science/article/pii/S2238785422016763Al–Mg–Si–Cu alloyOver-agingMicrostructureMechanical propertiesCrashing performance |
| spellingShingle | G.D. Jiang Y.H. Cai C. Qiu W.W. Zhang D.T. Zhang Effect of over-aging on the microstructure, mechanical properties and crashing performance of thin-walled Al–Mg–Si–Cu alloy profiles Journal of Materials Research and Technology Al–Mg–Si–Cu alloy Over-aging Microstructure Mechanical properties Crashing performance |
| title | Effect of over-aging on the microstructure, mechanical properties and crashing performance of thin-walled Al–Mg–Si–Cu alloy profiles |
| title_full | Effect of over-aging on the microstructure, mechanical properties and crashing performance of thin-walled Al–Mg–Si–Cu alloy profiles |
| title_fullStr | Effect of over-aging on the microstructure, mechanical properties and crashing performance of thin-walled Al–Mg–Si–Cu alloy profiles |
| title_full_unstemmed | Effect of over-aging on the microstructure, mechanical properties and crashing performance of thin-walled Al–Mg–Si–Cu alloy profiles |
| title_short | Effect of over-aging on the microstructure, mechanical properties and crashing performance of thin-walled Al–Mg–Si–Cu alloy profiles |
| title_sort | effect of over aging on the microstructure mechanical properties and crashing performance of thin walled al mg si cu alloy profiles |
| topic | Al–Mg–Si–Cu alloy Over-aging Microstructure Mechanical properties Crashing performance |
| url | http://www.sciencedirect.com/science/article/pii/S2238785422016763 |
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