analysis and comparison of friction stir welding and laser assisted friction stir welding of aluminum alloy
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2013
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Abstract
Friction Stir Welding (FSW) is a solid-state joining process; i.e., no melting occurs. The welding process is promoted by the rotation and translation of an axis-symmetric non-consumable tool along the weld centerline. Thus, the FSW process is performed at much lower temperatures than conventional fusion welding, nevertheless it has some disadvantages. Laser Assisted Friction Stir Welding (LAFSW) is a combination in which the FSW is the dominant welding process and the laser pre-heats the weld. In this work FSW and LAFSW tests were conducted on 6 mm thick 5754H111 aluminum alloy plates in butt joint configuration. LAFSW is studied firstly to demonstrate the weldability of aluminum alloy using that technique. Secondly, process parameters, such as laser power and temperature gradient are investigated in order to evaluate changes in microstructure, micro-hardness, residual stress, and tensile properties. Once the possibility to achieve sound weld using LAFSW is demonstrated, it will be possible to explore the benefits for tool wear, higher welding speeds, and lower clamping force.
| Reference Key |
campanelli2013materialsanalysis
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| Authors | ;Sabina Luisa Campanelli;Giuseppe Casalino;Caterina Casavola;Vincenzo Moramarco |
| Journal | Nature Materials |
| Year | 2013 |
| DOI |
10.3390/ma6125923
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