| Author | Search for: Ahmed, Mohamed; Search for: Javidani, Mousa; Search for: Mirakhorli, Fatemeh1; Search for: Maltais, Alexandre; Search for: Chen, X.-Grant |
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| Name affiliation | - National Research Council of Canada. Automotive and Surface Transportation
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| Format | Text, Article |
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| Conference | The 62nd Annual Conference of Metallurgists, COM 2023, August 21-24, 2023, Toronto, ON, Canada |
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| Subject | aluminum welding; Al-Si-Mg filler wires; magnesium content; microstructure; mechanical strengths of joints |
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| Abstract | Welding of aluminum alloys is a crucial manufacturing process to maintain the required in-service properties in transport industries. The commercial 4xxx aluminum filler wires provide the joints with relatively low strength. Therefore, to improve the strength of Al joints, it is required to develop new welding filler wires. In this study, the impact of Mg addition (0.6–1%) in two novel filler alloys on the performance and strength of Al joints was investigated. Two commercial 4xxx filler alloys (ER4043 and ER4943) were also selected for comparison. The gas metal arc welding was used to weld the AA6061-T6 sheets with thickness of 3-6 mm. The microstructure was studied by optical, scanning and transmission electron microscopies. The mechanical properties were characterized by microhardness and tensile tests. The results show that the microstructure of all joints consists of α-Al, eutectic Si, and Fe intermetallics, while the novel filler alloys exhibited the stronger precipitation strengthening in the fusion zone relative to the commercial fillers. The microhardness and the tensile strength of the samples joined by newly developed fillers were significantly improved compared to that of the commercial fillers, especially in the post-weld-heat-treatment condition. |
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| Publication date | 2023-08-21 |
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| Publisher | The Conference |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| NRC number | NRC_AST-2022-2023-38 |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | 9870cb4b-c504-4c1c-83fc-5092f8845a5e |
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| Record created | 2023-09-13 |
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| Record modified | 2023-09-13 |
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