Fatigue Property and Small Crack Propagation Mechanism of MIG Welding Joint of 6005A-T6 Aluminum Alloy
In this study, metal inert gas welding (MIG) was applied to 4 mm thick 6005A-T6 aluminum alloy welding. Compared with other parts, the hardness of the weld zone (WZ) was the lowest, about 67 HV. There was the Softening in WZ, which might make WZ the weakest zone. Then, fatigue tests were carried out...
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MDPI AG
2022-07-01
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| Online Access: | https://www.mdpi.com/1996-1944/15/13/4698 |
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| author | Zeng Peng Shanglei Yang Zhentao Wang Zihao Gao |
| author_facet | Zeng Peng Shanglei Yang Zhentao Wang Zihao Gao |
| author_sort | Zeng Peng |
| collection | DOAJ |
| description | In this study, metal inert gas welding (MIG) was applied to 4 mm thick 6005A-T6 aluminum alloy welding. Compared with other parts, the hardness of the weld zone (WZ) was the lowest, about 67 HV. There was the Softening in WZ, which might make WZ the weakest zone. Then, fatigue tests were carried out on MIG welded joints. All the fatigue specimens fractured at the weld toe of the lap joint, and the fracture was characterized by a cleavage fracture. Crack closure induced by oxide was observed during the steady propagation of the fatigue crack. Impurities hindered crack propagation, changed the direction of crack propagation, and appeared in stepped fatigue strip distribution morphology; in the process of the main crack propagation, the initiation and propagation of small cracks were easily restricted and hindered by the main crack, which slowed down the propagation rate and even stopped the propagation directly. |
| first_indexed | 2024-03-09T10:27:10Z |
| format | Article |
| id | doaj.art-5d78c2daa4df45c587312ac0f2a421dc |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-09T10:27:10Z |
| publishDate | 2022-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-5d78c2daa4df45c587312ac0f2a421dc2023-12-01T21:34:45ZengMDPI AGMaterials1996-19442022-07-011513469810.3390/ma15134698Fatigue Property and Small Crack Propagation Mechanism of MIG Welding Joint of 6005A-T6 Aluminum AlloyZeng Peng0Shanglei Yang1Zhentao Wang2Zihao Gao3School of Materials Engineering, Shanghai University of Engineering Science, Shanghai 201620, ChinaSchool of Materials Engineering, Shanghai University of Engineering Science, Shanghai 201620, ChinaSchool of Materials Engineering, Shanghai University of Engineering Science, Shanghai 201620, ChinaSchool of Materials Engineering, Shanghai University of Engineering Science, Shanghai 201620, ChinaIn this study, metal inert gas welding (MIG) was applied to 4 mm thick 6005A-T6 aluminum alloy welding. Compared with other parts, the hardness of the weld zone (WZ) was the lowest, about 67 HV. There was the Softening in WZ, which might make WZ the weakest zone. Then, fatigue tests were carried out on MIG welded joints. All the fatigue specimens fractured at the weld toe of the lap joint, and the fracture was characterized by a cleavage fracture. Crack closure induced by oxide was observed during the steady propagation of the fatigue crack. Impurities hindered crack propagation, changed the direction of crack propagation, and appeared in stepped fatigue strip distribution morphology; in the process of the main crack propagation, the initiation and propagation of small cracks were easily restricted and hindered by the main crack, which slowed down the propagation rate and even stopped the propagation directly.https://www.mdpi.com/1996-1944/15/13/46986005A-T6 aluminum alloyMIGfatiguecrack propagation |
| spellingShingle | Zeng Peng Shanglei Yang Zhentao Wang Zihao Gao Fatigue Property and Small Crack Propagation Mechanism of MIG Welding Joint of 6005A-T6 Aluminum Alloy Materials 6005A-T6 aluminum alloy MIG fatigue crack propagation |
| title | Fatigue Property and Small Crack Propagation Mechanism of MIG Welding Joint of 6005A-T6 Aluminum Alloy |
| title_full | Fatigue Property and Small Crack Propagation Mechanism of MIG Welding Joint of 6005A-T6 Aluminum Alloy |
| title_fullStr | Fatigue Property and Small Crack Propagation Mechanism of MIG Welding Joint of 6005A-T6 Aluminum Alloy |
| title_full_unstemmed | Fatigue Property and Small Crack Propagation Mechanism of MIG Welding Joint of 6005A-T6 Aluminum Alloy |
| title_short | Fatigue Property and Small Crack Propagation Mechanism of MIG Welding Joint of 6005A-T6 Aluminum Alloy |
| title_sort | fatigue property and small crack propagation mechanism of mig welding joint of 6005a t6 aluminum alloy |
| topic | 6005A-T6 aluminum alloy MIG fatigue crack propagation |
| url | https://www.mdpi.com/1996-1944/15/13/4698 |
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