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Experimental Investigation of Mechanical and Corrosion Characteristics of Friction Stir Welded Aluminum Alloy 7075-T6

Assistant Professor-Deepankumar S
Published 2019-10-11 by SAE International in United States
Friction Stir Welding (FSW) is a quite new solid-state joining process. This joining technique is energy efficient, environment friendly, and adaptable. In particular, it can be used to join high- strength Aluminium alloys and other metallic alloys that are difficult to weld by conventional fusion welding. Friction Stir Welding heats metal to the temperature below re crystallization. FSW avoids welding defects like porosity and hot cracking which are frequently in conventional welding techniques due to alloy’s very low re- crystallization temperature and higher heat dissipating nature. This process combining deformation heating and mechanical work to obtain high defect free joints. Aluminum alloy 7075-T6 is generally used in various industrial applications such as automobile, ship building and aerospace due to their light weight, good mechanical properties and high corrosion resistance. In the present study, aluminum alloy 7075-T6 was successfully made by friction stir welding technique. The Corrosion, micro structure analysis and mechanical behavior of the welded joints were investigated at different welding parameters.
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