Effects of Helium Addition to Ar-Based Shielding Gas on the Lap-Joint Performance of 5052 Aluminum Alloy to Galvanized Steel Sheet during the MIG Weld-Brazing Process
| Autor: | You Jiun Wang, Hsin Ya Chen, Hsuan Liang Lin |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
0209 industrial biotechnology
Materials science Shielding gas Alloy Metallurgy 02 engineering and technology Welding engineering.material 021001 nanoscience & nanotechnology Condensed Matter Physics Atomic and Molecular Physics and Optics Galvanization Gas metal arc welding law.invention symbols.namesake 020901 industrial engineering & automation Lap joint law symbols 5052 aluminium alloy engineering Brazing General Materials Science 0210 nano-technology |
| Zdroj: | Solid State Phenomena. 305:129-135 |
| ISSN: | 1662-9779 |
| DOI: | 10.4028/www.scientific.net/ssp.305.129 |
| Popis: | In the metal inert gas (MIG) weld-brazing process, the lap-joint welds between 5052 aluminum alloy and automotive galvanized steel sheet were achieved employing an automatic MIG welding machine. The different percentage of helium (He) gas addition to pure argon (Ar) shielding gas was selected to investigate the performance of lap-joint welds such as appearance of weld bead surface, weld bead geometry, microstructure, tensile strength, fracture surface of welds and thickness of intermetallic compounds (IMCs) layer between the dissimilar materials in the brazing zone. The results showed that the lap-joint welds produced by adding 5% and 10% He gas to Ar shielding gas were provided with better performance of specimens. The average tensile strength of lap-joint welds between 5052 aluminum alloy and automotive galvanized steel sheet is 206.23 MPa. In additions, the amount of porosity in the fusion zone that specimens produced by using 10% He addition to Ar-based shielding gas is less than others. It can be found that the thickness of IMCs layer between the weld bead and automotive galvanized steel sheet from 3.30 μm to 4.90 μm. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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