Interfacial bonding mechanism and length evaluation method of the longitudinal welds in the unsteady deformation process of porthole die extrusion of aluminum alloy profiles
In this work, a porthole die extrusion experiment was carried out on an aluminum alloy profile used for air-conditioning refrigerator ice box. Microstructural characterization and mechanical property tests were performed at different positions of a longitudinal weld in the profile head. The results...
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Elsevier
2022-09-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785422012261 |
| _version_ | 1811199944558641152 |
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| author | Yuelin Wang Guoqun Zhao Wendong Zhang Lu Sun Xiaowei Wang Zhengfeng Lv |
| author_facet | Yuelin Wang Guoqun Zhao Wendong Zhang Lu Sun Xiaowei Wang Zhengfeng Lv |
| author_sort | Yuelin Wang |
| collection | DOAJ |
| description | In this work, a porthole die extrusion experiment was carried out on an aluminum alloy profile used for air-conditioning refrigerator ice box. Microstructural characterization and mechanical property tests were performed at different positions of a longitudinal weld in the profile head. The results indicated that, from the unsteady to steady extrusion stage, the number, sizes and depths of the voids gradually decrease. The oxides are gradually broken into flakes and eventually disappear. The grain boundaries gradually cross the welding interfaces to form new grains, and the welding quality is gradually improved. The ultimate tensile strength (UTS) of the longitudinal welds shows an upward trend, the elongation (EL) first rises and then tends to be stable. Before complete welding, the hardness at the welding interface is lower than those of the areas on both sides of the interface. Based on the results of testing and characterization, the interfacial bonding mechanism of the longitudinal welds in the unsteady zones was revealed. A method for predicting the length of the unsteady zones of profiles extruded by porthole die was proposed, by which the length of the unsteady zone of the aluminum alloy profile used for air-conditioning refrigerator ice box was successfully predicted. |
| first_indexed | 2024-04-12T01:55:30Z |
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| id | doaj.art-04802b88b9d440c6ab276c682ee5d438 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-04-12T01:55:30Z |
| publishDate | 2022-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-04802b88b9d440c6ab276c682ee5d4382022-12-22T03:52:48ZengElsevierJournal of Materials Research and Technology2238-78542022-09-012016241644Interfacial bonding mechanism and length evaluation method of the longitudinal welds in the unsteady deformation process of porthole die extrusion of aluminum alloy profilesYuelin Wang0Guoqun Zhao1Wendong Zhang2Lu Sun3Xiaowei Wang4Zhengfeng Lv5Key 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.Linqu Inspection and Testing Center, Linqu, Shandong 262600, 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 ChinaShandong Nanshan Aluminum Co., Ltd. Longkou, Shandong 264000, PR ChinaIn this work, a porthole die extrusion experiment was carried out on an aluminum alloy profile used for air-conditioning refrigerator ice box. Microstructural characterization and mechanical property tests were performed at different positions of a longitudinal weld in the profile head. The results indicated that, from the unsteady to steady extrusion stage, the number, sizes and depths of the voids gradually decrease. The oxides are gradually broken into flakes and eventually disappear. The grain boundaries gradually cross the welding interfaces to form new grains, and the welding quality is gradually improved. The ultimate tensile strength (UTS) of the longitudinal welds shows an upward trend, the elongation (EL) first rises and then tends to be stable. Before complete welding, the hardness at the welding interface is lower than those of the areas on both sides of the interface. Based on the results of testing and characterization, the interfacial bonding mechanism of the longitudinal welds in the unsteady zones was revealed. A method for predicting the length of the unsteady zones of profiles extruded by porthole die was proposed, by which the length of the unsteady zone of the aluminum alloy profile used for air-conditioning refrigerator ice box was successfully predicted.http://www.sciencedirect.com/science/article/pii/S2238785422012261Porthole die extrusionLongitudinal weldsMicrostructureMechanical propertiesInterfacial bonding mechanismProfile head |
| spellingShingle | Yuelin Wang Guoqun Zhao Wendong Zhang Lu Sun Xiaowei Wang Zhengfeng Lv Interfacial bonding mechanism and length evaluation method of the longitudinal welds in the unsteady deformation process of porthole die extrusion of aluminum alloy profiles Journal of Materials Research and Technology Porthole die extrusion Longitudinal welds Microstructure Mechanical properties Interfacial bonding mechanism Profile head |
| title | Interfacial bonding mechanism and length evaluation method of the longitudinal welds in the unsteady deformation process of porthole die extrusion of aluminum alloy profiles |
| title_full | Interfacial bonding mechanism and length evaluation method of the longitudinal welds in the unsteady deformation process of porthole die extrusion of aluminum alloy profiles |
| title_fullStr | Interfacial bonding mechanism and length evaluation method of the longitudinal welds in the unsteady deformation process of porthole die extrusion of aluminum alloy profiles |
| title_full_unstemmed | Interfacial bonding mechanism and length evaluation method of the longitudinal welds in the unsteady deformation process of porthole die extrusion of aluminum alloy profiles |
| title_short | Interfacial bonding mechanism and length evaluation method of the longitudinal welds in the unsteady deformation process of porthole die extrusion of aluminum alloy profiles |
| title_sort | interfacial bonding mechanism and length evaluation method of the longitudinal welds in the unsteady deformation process of porthole die extrusion of aluminum alloy profiles |
| topic | Porthole die extrusion Longitudinal welds Microstructure Mechanical properties Interfacial bonding mechanism Profile head |
| url | http://www.sciencedirect.com/science/article/pii/S2238785422012261 |
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