INTECIN   20395
INSTITUTO DE TECNOLOGIAS Y CIENCIAS DE LA INGENIERIA "HILARIO FERNANDEZ LONG"
Unidad Ejecutora - UE
artículos
Título:
Effect of heat input on AA5052 friction stir welds characteristics
Autor/es:
L. TUFARO; I. MANZONI; H. G. SVOBODA
Revista:
Procedia Materials Science
Editorial:
Elsevier
Referencias:
Lugar: Amsterdam; Año: 2015 vol. 8 p. 914 - 923
Resumen:
Friction Stir Welding (FSW) is a relatively novel solid state welding process that strong enhanced the welding of aluminumalloys for structural applications. In this process, the heat necessary for the required plastic flow of material is produced at theinterfase tool-work piece, being affected by factors such as rotational speed, axial load and tool shoulder diameter, among others.The objective of this work was to study the effect of tool shoulder diameter on heat input during FSW of AA5052-H32 alloy andthe resulting characteristics of the produced welded joints. Tools of 10, 12, 14 and 16 mm shoulder diameter were constructedand used to butt weld plates of 3 mm thick of AA5052-H32 aluminum alloy. Welds were made with 514 rpm of rotational speedand 98 mm/min of welding speed. Thermal cycles were acquired during welding using thermocouples. Macrostructuralcharacterization and Vickers microhardness profiles were done on each welded sample. It was observed an increase in powerwith shoulder diameter, as well as a lower level of defects in the stirred zone, related with an improved plastic flow. Hardnessalso decreased with tool diameter, due to a higher thermal effect on the microstructure.