Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Influence of Tool-base Metal Interference on the Performance of Aluminum-Magnesium Alloy Joined by Bobbin Tool Friction Stir Welding

Sebastian Balos
ORCID logo ,
Danka Labus Zlatanovic
ORCID logo ,
Nenad Kulundzic
,
Petar Janjatovic
ORCID logo ,
Miroslav Dramicanin
ORCID logo ,
Zorana Lanc
,
Miodrag Hadzistevic
,
Slobodan Radisic
* ,
Dragan Rajnovic
ORCID logo ,
Milan Pecanac
* ORCID logo
Version 1 : Received: 18 May 2023 / Approved: 19 May 2023 / Online: 19 May 2023 (07:53:58 CEST)

A peer-reviewed article of this Preprint also exists.

Balos, S.; Labus Zlatanovic, D.; Kulundzic, N.; Janjatovic, P.; Dramicanin, M.; Lanc, Z.; Hadzistevic, M.; Radisic, S.; Rajnovic, D.; Pecanac, M. Influence of Tool–Base Metal Interference on the Performance of an Aluminium–Magnesium Alloy Joined via Bobbin Tool Friction Stir Welding. Metals 2023, 13, 1215. Balos, S.; Labus Zlatanovic, D.; Kulundzic, N.; Janjatovic, P.; Dramicanin, M.; Lanc, Z.; Hadzistevic, M.; Radisic, S.; Rajnovic, D.; Pecanac, M. Influence of Tool–Base Metal Interference on the Performance of an Aluminium–Magnesium Alloy Joined via Bobbin Tool Friction Stir Welding. Metals 2023, 13, 1215.

Abstract

Bobbin Tool Friction Stir Welding (BTFSW) is a variant of FSW process using the special two shoulder tool that forms the top and bottom weld surface. As such, a significant simplification of welding setup is achieved. One of the dominant parameters of BTFSW process is the interference between tool shoulder pinch gap and weld metal thickness. In this research, the influence of interference of the square pin tool with convex shoulders on process temperature, microstructure, tensile, impact and bend performance were studied, and appropriate correlations were devised. The base metal was aluminum-magnesium alloy, with the interference varied in the range of 0.1 to 0.5 mm. The worm defects and irregularities were found in all specimens except in specimen welded with 0.4 mm interference. Optimal interference of 0.4 mm resulted in the highest mechanical properties, which, in terms of tensile strength and reduction of area were similar to the base metal. Furthermore, impact strength was significantly higher, which was attributed to grain refinement effect in the nugget zone.

Keywords

bobbin tool; friction stir welding; interference; mechanical properties

Subject

Engineering, Mechanical Engineering

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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