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<p>Friction stir welding (FSW) is a solid-state joining process in which two materials are joined without melting using a non-consumable tool. This research aims to use FSW to produce welds of aluminum with magnesium alloy with superior mechanical properties. Aluminum AA7075 and magnesium AZ31B metals were welded using FSW with various process parameters such as tool rotation speed of 600 and 700&#xa0;rpm, welding speed of 20 and 25&#xa0;mm/min, and tool pin profile of cylindrical and taper. Tensile, hardness, and impact tests were done to evaluate the mechanical properties of the weld. Maximum ultimate tensile strength of 110&#xa0;MPa has been obtained using a taper tool, 600&#xa0;rpm and 20&#xa0;mm/min. Maximum energy absorbed from impact test is 18&#xa0;J with process parameter 700&#xa0;rpm 20&#xa0;mm/min and cylindrical tool. Microstructural characterization has been done on the weld interface and on the fractured surface.</p>

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Investigation of Mechanical Properties and Effect of Process Parameters on Dissimilar Friction Stir-Welded AA7075 with AZ31B Alloy

  • 期刊论文

  • 发表日期：

    2025年6月6日

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  • R. Rajaprasanna,
  • N. Srirangarajalu,
  • Sathishkumar Selvaraj

摘要

Friction stir welding (FSW) is a solid-state joining process in which two materials are joined without melting using a non-consumable tool. This research aims to use FSW to produce welds of aluminum with magnesium alloy with superior mechanical properties. Aluminum AA7075 and magnesium AZ31B metals were welded using FSW with various process parameters such as tool rotation speed of 600 and 700 rpm, welding speed of 20 and 25 mm/min, and tool pin profile of cylindrical and taper. Tensile, hardness, and impact tests were done to evaluate the mechanical properties of the weld. Maximum ultimate tensile strength of 110 MPa has been obtained using a taper tool, 600 rpm and 20 mm/min. Maximum energy absorbed from impact test is 18 J with process parameter 700 rpm 20 mm/min and cylindrical tool. Microstructural characterization has been done on the weld interface and on the fractured surface.