FEATURES OF MATERIAL FLOW IN FRICTION STIR WELDING OF ALUMINUM ALLOYS

Language: BGPages: 48–53

Assoc. Prof. Danail Gospodinov, PhD

Department of Material Science and Technology “Angel Kanchev” University of Ruse

ORCID: 0000-0002-8239-2321

E-mail: dgospodinov@uni-ruse.bg

Assist. Prof. Nikolay Ferdinandov, PhD

Department of Material Science and Technology “Angel Kanchev” University of Ruse

ORCID: 0009-0007-6063-4813

E-mail: nferdinandov@uni-ruse.bg

Daniela Nenova, PhD Student

Department of Material Science and Technology “Angel Kanchev” University of Ruse

ORCID: 0009-0005-7202-548X

E-mail: dnenova@uni-ruse.bg

Abstract: Friction stir welding is a modern method for joining materials in the solid state. The method is mainly used for welding aluminum alloys. It uses a rotating tool that creates heat due to friction between it and the parts being welded. As a result, the material is heated to a plastic state without melting and mixed with the help of the tool.
The movement of the material flow is crucial for the formation of a quality weld. During the process, the plastic metal moves from the front to the back of the pin, forming a weld. If this flow is not well controlled, defects such as voids, pores or lack of mixing can occur.

Keywords: Friction Stir Welding, Material flow, Zones

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