Original scientific paper

https://doi.org/10.17559/TV-20241116002134

Influence of Welding Parameters on Weld Quality and Spindle Load During Friction Stir Welding

Jozef Bárta orcid.org/0000-0003-0607-4433 ; Slovak University of Technology in Bratislava, Faculty of Materials Science and Technology in Trnava, Institute of Production Technologies, Paulínska 16, 91701 Trnava, Slovakia *
Katarína Bártová orcid.org/0000-0002-1241-6447 ; Slovak University of Technology in Bratislava, Faculty of Materials Science and Technology in Trnava, Institute of Production Technologies, Paulínska 16, 91701 Trnava, Slovakia
Milan Marônek orcid.org/0000-0002-4716-8092 ; Slovak University of Technology in Bratislava, Faculty of Materials Science and Technology in Trnava, Institute of Production Technologies, Paulínska 16, 91701 Trnava, Slovakia
František Jurina ; Slovak University of Technology in Bratislava, Faculty of Materials Science and Technology in Trnava, Institute of Production Technologies, Paulínska 16, 91701 Trnava, Slovakia
Roman Kukuča ; Slovak University of Technology in Bratislava, Faculty of Materials Science and Technology in Trnava, Institute of Production Technologies, Paulínska 16, 91701 Trnava, Slovakia

* Corresponding author.

Abstract

Friction stir welding brings advantage in utilisation of green joining technology even to companies dealing only with machining. In contrary to machining, FSW uses tools with not sharp geometry therefore welding parameters and tool geometry play main role in application of this process to standard machines. Different welding speed was applied during experiment to see the influence on spindle load. Results confirmed almost linear dependence between welding speed and spindle load. Highest spindle load of 2.55 kW was observed while welding 5mm thick AW7075 aluminium alloy at 800 mm/min welding speed. Experiment showed a good performance of the tool while producing good quality weld joints in welding speeds lower than 600 mm/min. Macroscopic and microscopic analysis did not show any abnormalities, however welding speeds exceeding 600 mm/min exhibited discontinuities in root section that may indicate the formation of tunnel defect. Microscopic analysis showed significant deformation of original grains in thermomechanically affected zone and very fine grain structure in stir zone.

Keywords

AW 7075-T651; friction stir welding; spindle load; structural analysis

Hrčak ID:

330577

URI

https://hrcak.srce.hr/330577

Publication date:

1.5.2025.

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