Title: Comparative study of mechanical and microstructural properties single and double sided FSW friction stir welded aluminium alloy AA6062

Authors: Vijay Kumar Dwivedi; Dipak Kumar

Addresses: Department of Mechanical Engineering, GLA University, Mathura, 281406, UP, India ' Department of Mechanical Engineering, RKGIT, Ghaziabad-201003, UP, India

Abstract: The aim of the present examination was to find strength of friction stir (FS) welds done using two sets of tool rotation speed and welding speed, and also to compare between single- and double-sided FS welding process for mechanical strength. Friction stir welding (FSW) is utilised for welding plates. Afterwards, single and double pass processes were applied to know comparative behaviour and effect of pass on mechanical strength. Furthermore, scanning electron microscopy (SEM) and optical microscopy (OM) were carried out to characterise microstructure. Optimised values of mechanical strength as ultimate tensile strength (UTS) i.e., 339.23 N/mm² and yield strength i.e., 248.13 N/mm² were evaluated under double pass friction conditions at 1800 RPM, and 35 mm/min. Consequences of single and double passes were considered on variable parameters i.e., tool rotational speed (1800 RPM), welding speed (35 mm/min). Comparative strength corresponding to optical microstructures were studied for single and double passes.

Keywords: FSW; friction stir welding; 6062 aluminium alloy (AA); microstructure; mechanical strength.

DOI: 10.1504/IJMSI.2023.135906

International Journal of Materials and Structural Integrity, 2023 Vol.15 No.1, pp.55 - 76

Received: 12 Jan 2022
Received in revised form: 21 Oct 2022
Accepted: 12 Jan 2023
Published online: 09 Jan 2024 *

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