Investigating the effect of adding WS2 nanosheets on the microstructure and mechanical properties of 5083 aluminum alloy welded by friction stir welding (FSW) method

مهندسی متالورژی و مواد

Article 6, Volume 35, Issue 3 - Serial Number 35, October 2024, Pages 83-98   

Document Type: Original Articles

DOI: 10.22067/jmme.2024.85793.1133

Author

Mohammad Alipour^*

Faculty of Mechanical engineering, Department of Materials Engineering, University of Tabriz, Iran

Abstract

This study aims to investigate the number of passes and the addition of WS2 nanoplates to friction stir welding (FSW) joints of aluminum alloy 5083 on the microstructure, strength and hardness properties. At first, the combination of the two factors of rotational speed and forward speed was used and the optimal state was selected in the absence of surface and metallurgical defects and the maximum value of the final tensile strength. Then FSW was performed with or without the addition of WS2 nanoplates for different pass numbers. Microstructural observations showed that the grain size in the stirred area decreased with the increase in the number of welding passes and a uniform distribution of particles was obtained. Also, the use of continuous four-pass welding with a rotational rotational speed of 700 rpm and forward speed of 14 mm/min increases the tensile strength by 52 MPa and 35 Hv in the hardness value compared to the sample without the addition of nanoplates.

Keywords

Friction stir welding; Weld pass numbers; Mechanical properties; Microstructure

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