COMPARATIVE STUDY OF JOINING HETEROGENEOUS STRUCTURES MADE BY SOME ALUMINIUM ALLOYS USING FSW PROCESS

Abstract

Friction Stir Welding (FSW) is an economic and ecological process (the use of additive materials and shielding gas is unnecessary, does not emit harmful gases, uses less energy), which offers important advantages, such as the possibility of joining materials with different properties (e.g., Al - Cu) and making several types of structures. This article aims to carry out a short comparative analysis between end-to-end structures and overlapping structures obtained from some aluminium alloys: AA2024, AA6061, and AA7075. A comparison is presented between the types of tools used to obtain the mentioned structures, between the values of the process parameters, as well as their other particularities. The characteristics of FSW joint structures are analyzed based on the macro and microstructure of the joint and its mechanical properties. Finally, conclusions are presented that allow the orientation of future studies and research.