This paper contains the metallurgical and technological characterizations of CO2 Laser-MIG combined welding of Al-Mg alloy sheets. The bead-on-plate welds were either 3 mm and 10 mm thick. Metallurgical structures either of the fused zone and the welding boundaries were identified. Porosity and solidification cracks were localised and explained. Then, full penetration 3 mm thick samples with a low defectiveness underwent 3-points bending tests. The strain hardening in those welds, which was due to the bending deformation, was evaluated by the hardness test. A finite element numerical model for the bending was built in order to evaluate the residual stress and the internal strain of the welds.
Characterisation of al-mg alloys MIG-Laser CO2 combined welding / Casalino, Giuseppe; Ludovico, Antonio; Chieco, Giuseppe. - CD-ROM. - (2005), pp. 190-195. (Intervento presentato al convegno 24th International Congress on Applications of Lasers and Electro-Optics, ICALEO 2005 tenutosi a Miami, FL nel October 31 - November 3, 2005).
Characterisation of al-mg alloys MIG-Laser CO2 combined welding
Casalino, Giuseppe;Ludovico, Antonio;
2005-01-01
Abstract
This paper contains the metallurgical and technological characterizations of CO2 Laser-MIG combined welding of Al-Mg alloy sheets. The bead-on-plate welds were either 3 mm and 10 mm thick. Metallurgical structures either of the fused zone and the welding boundaries were identified. Porosity and solidification cracks were localised and explained. Then, full penetration 3 mm thick samples with a low defectiveness underwent 3-points bending tests. The strain hardening in those welds, which was due to the bending deformation, was evaluated by the hardness test. A finite element numerical model for the bending was built in order to evaluate the residual stress and the internal strain of the welds.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
