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Effect of post-welding heat treatments on mechanical properties of double-lap FSW joints in dissimilar aluminium alloys Effetto dei trattamenti termici post-FSW sulle caratteristiche meccaniche di giunti doppi sovrapposti dissimili
Last modified: 2011-06-09
Abstract
Friction Stir Welding (FSW) is a solid state joining method particularly suited for aluminium alloys, which are often difficult to be fusion welded without hot cracking, porosity or distortion. The present study focuses on double lap Friction Stir Welded (FSW) joints in 2024T3 and 7075T6 aluminium alloys subjected to several post-welding heat treatments at warm (typical aging) and high temperature (solution range), followed by room temperature deformation (tensile tests). The tensile and fracture behaviour of the joints after heat treatment at low temperature is completely different when compared with their properties after exposure at high temperature. Interpretation of results is based on microstructure evolution of the FSW joints.
KEYWORDS. FSW; Double-lap joint; Fracture; Heat treatment; Tensile properties; Hardness; Microstructure.
KEYWORDS. FSW; Double-lap joint; Fracture; Heat treatment; Tensile properties; Hardness; Microstructure.
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