Optimization design of porthole die and study on microstructures and mechanical properties for an Al–Li alloy hollow profile
In this paper, a hollow Al–Li alloy profile was taken as an example, and the optimization design method of Al–Li alloy porthole die was given. Compared with the basic die design, the optimized die reduces the standard deviations of velocity and temperature as well as the maximum equivalent stress, r...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2024-03-01
|
| Series: | Journal of Materials Research and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785424001388 |
| _version_ | 1827310818505523200 |
|---|---|
| author | Yuelin Wang Guoqun Zhao Junquan Yu Xiaowei Wang Shaoqiang Xu |
| author_facet | Yuelin Wang Guoqun Zhao Junquan Yu Xiaowei Wang Shaoqiang Xu |
| author_sort | Yuelin Wang |
| collection | DOAJ |
| description | In this paper, a hollow Al–Li alloy profile was taken as an example, and the optimization design method of Al–Li alloy porthole die was given. Compared with the basic die design, the optimized die reduces the standard deviations of velocity and temperature as well as the maximum equivalent stress, resulting in a significant reduction of the distortion degree of the extruded profile, and the optimized die meets the strength requirements. The microstructures, mechanical properties and strain distributions of the longitudinal welds and matrices of the extruded profile were analyzed. It is found that the longitudinal welds are well welded without macro/micro defects. The fracture of tensile specimens all occurred at the matrices instead of welds, and the mechanical properties in the thick-walled matrices are much lower than those in the thin-walled matrices. The grain size in the thick-wall matrices is much coarser and more ununiform than that in the thin-walled matrices, which is caused by the low strain in the thick-walled matrices. For increasing the strain amount and uniformity of local zone of the extruded profile, an innovative method through adding baffle-blocks in the portholes was proposed. |
| first_indexed | 2024-03-08T12:47:48Z |
| format | Article |
| id | doaj.art-dc4fb36883eb43f49507357c380a30a8 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-04-24T20:06:06Z |
| publishDate | 2024-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-dc4fb36883eb43f49507357c380a30a82024-03-24T06:57:23ZengElsevierJournal of Materials Research and Technology2238-78542024-03-0129400415Optimization design of porthole die and study on microstructures and mechanical properties for an Al–Li alloy hollow profileYuelin Wang0Guoqun Zhao1Junquan Yu2Xiaowei Wang3Shaoqiang Xu4Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education), Shandong University, Jinan, Shandong, 250061, PR ChinaKey Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education), Shandong University, Jinan, Shandong, 250061, PR China; Corresponding author. Key Laboratory for Liquid–Solid Structural Evolution and Processing of Materials (Ministry of Education), Shandong University, Jinan, Shandong, 250061, PR China.Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education), Shandong University, Jinan, Shandong, 250061, PR China; Corresponding author. Key Laboratory for Liquid–Solid Structural Evolution and Processing of Materials (Ministry of Education), Shandong University, Jinan, Shandong, 250061, PR China.Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education), Shandong University, Jinan, Shandong, 250061, PR ChinaWQ&UCAS (Binzhou) Industrialization Research Institute Co., Ltd, Binzhou, Shandong, 256212, PR ChinaIn this paper, a hollow Al–Li alloy profile was taken as an example, and the optimization design method of Al–Li alloy porthole die was given. Compared with the basic die design, the optimized die reduces the standard deviations of velocity and temperature as well as the maximum equivalent stress, resulting in a significant reduction of the distortion degree of the extruded profile, and the optimized die meets the strength requirements. The microstructures, mechanical properties and strain distributions of the longitudinal welds and matrices of the extruded profile were analyzed. It is found that the longitudinal welds are well welded without macro/micro defects. The fracture of tensile specimens all occurred at the matrices instead of welds, and the mechanical properties in the thick-walled matrices are much lower than those in the thin-walled matrices. The grain size in the thick-wall matrices is much coarser and more ununiform than that in the thin-walled matrices, which is caused by the low strain in the thick-walled matrices. For increasing the strain amount and uniformity of local zone of the extruded profile, an innovative method through adding baffle-blocks in the portholes was proposed.http://www.sciencedirect.com/science/article/pii/S2238785424001388Al-Li alloyPorthole die extrusionDie optimization designMicrostructuresMechanical properties |
| spellingShingle | Yuelin Wang Guoqun Zhao Junquan Yu Xiaowei Wang Shaoqiang Xu Optimization design of porthole die and study on microstructures and mechanical properties for an Al–Li alloy hollow profile Journal of Materials Research and Technology Al-Li alloy Porthole die extrusion Die optimization design Microstructures Mechanical properties |
| title | Optimization design of porthole die and study on microstructures and mechanical properties for an Al–Li alloy hollow profile |
| title_full | Optimization design of porthole die and study on microstructures and mechanical properties for an Al–Li alloy hollow profile |
| title_fullStr | Optimization design of porthole die and study on microstructures and mechanical properties for an Al–Li alloy hollow profile |
| title_full_unstemmed | Optimization design of porthole die and study on microstructures and mechanical properties for an Al–Li alloy hollow profile |
| title_short | Optimization design of porthole die and study on microstructures and mechanical properties for an Al–Li alloy hollow profile |
| title_sort | optimization design of porthole die and study on microstructures and mechanical properties for an al li alloy hollow profile |
| topic | Al-Li alloy Porthole die extrusion Die optimization design Microstructures Mechanical properties |
| url | http://www.sciencedirect.com/science/article/pii/S2238785424001388 |
| work_keys_str_mv | AT yuelinwang optimizationdesignofportholedieandstudyonmicrostructuresandmechanicalpropertiesforanallialloyhollowprofile AT guoqunzhao optimizationdesignofportholedieandstudyonmicrostructuresandmechanicalpropertiesforanallialloyhollowprofile AT junquanyu optimizationdesignofportholedieandstudyonmicrostructuresandmechanicalpropertiesforanallialloyhollowprofile AT xiaoweiwang optimizationdesignofportholedieandstudyonmicrostructuresandmechanicalpropertiesforanallialloyhollowprofile AT shaoqiangxu optimizationdesignofportholedieandstudyonmicrostructuresandmechanicalpropertiesforanallialloyhollowprofile |