Investigation of Metallurgical Structure and Mechanical Properties of Double-Sided Friction Stir Welded joint of AA5083 Plates

مهندسی متالورژی و مواد

Article 8, Volume 31, Issue 1 - Serial Number 21, March 2020, Pages 89-100   

Document Type: Original Articles

DOI: 10.22067/ma.v31i1.66237

Authors

Behrooz Rahmatian; Seyyed Ehsan Mirsalehi^* ; Kamran Dehghani

Amirkabir University of Technology

Abstract

In this research, the effect of major welding parameters on microstructural evolutions and mechanical properties of double-sided friction stir welded thick 5083 aluminum alloy joints was investigated. For the traverse speed of 80 mm/min, the increase in the rotational speed does not have any effect on the average grain size. In this case, it can be said that the annealing grain growth and recrystallization effect counteract and neutralize each other. However, for the traverse speed of 40 mm/min, with increasing the rotational speed, the grain size increases due to the dominance of annealing grain growth effect. Grain size in the stir zone was decreased about ten time as compared with base metal; however, no considerable increase was observed in the hardness of the stir zone and the hardness profile remained almost uniform alongside the joint area. The best joint efficiency was equal to 99.4 % with the pin length of 6 mm and transverse and rotational speeds of 80 mm/min and 1000 rpm, respectively. Also, the elongation was improved about 9 % compared to the base metal.

Keywords

Double-sided Friction Stir Welding; aluminum alloy; Pin Length; Traverse Speed; Rotational speed; Microstructure; Mechanical properties

Supplementary Files

8-mirsalehi - Revised-1.pdf

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