Effect of tool geometry in dissimilar Al-Steel Friction Stir Welding
| Autor: | Dheerendra Kumar Dwivedi, Pankaj Kaushik |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
0209 industrial biotechnology
Materials science Carbon steel Scanning electron microscope Strategy and Management Butt welding Geometry 02 engineering and technology Welding Management Science and Operations Research engineering.material 021001 nanoscience & nanotechnology Industrial and Manufacturing Engineering law.invention 020901 industrial engineering & automation Optical microscope law Heat generation 5052 aluminium alloy engineering Friction stir welding 0210 nano-technology |
| Zdroj: | Journal of Manufacturing Processes. 68:198-208 |
| ISSN: | 1526-6125 |
| DOI: | 10.1016/j.jmapro.2020.08.007 |
| Popis: | Aluminum-Steel joining is an example of a multi-material design. An amalgamation of both the material is very beneficial, yet they pose their set of difficulties in joining due to a significant difference in properties. Solid-state joining processes such as friction stir welding are beneficial in avoiding fusion and formation of a thick intermetallic layer in the Al-steel joint. Critical control of process parameters and tool geometry is essential in friction stir welding to attain a reasonably sound joint. In present work, butt welding of low carbon steel with Aluminum 5052 alloy is performed with the use of three different tools. Progressive refinement in the geometry of tools was done to achieve the optimized dimensions of the tool. The weld joints obtained from various tools were compared based on heat generation. The joints were characterized based on peak temperature achieved, tensile strength, and the number of steel fragments in the Al matrix through micrographs. The weld joint was observed under an optical microscope and Field emission scanning electron microscope (FESEM) for quantification of intermetallic compounds (IMC) layer. Energy-dispersive X-ray spectroscopy (EDX) and XRD analysis were performed to investigate the phase and composition of the IMC layer. The fractured surface under tensile loading was observed under high magnification scanning electron microscope. The tool with a shoulder diameter of 13 mm and a cylindrical pin was found to be optimized for its minimum heat generation and strongest weld joint formation with a minimum number of void-causing steel fragments. |
| Databáze: | OpenAIRE |
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