Microstructure and properties of welds between 5754 Al alloys and AZ31 Mg alloys using a Yb:YAG laser

Sana Bannour (1) , Michel Autric (2) , Jean-Eric Masse (3) , Simone Matteï (4) , Hatem Mhiri (1)

1 ENIM - École Nationale d’Ingénieurs de Monastir
2 AMU - Aix Marseille Université
3 MSMP - Mechanics surfaces and materials processing
4 ICB - Laboratoire Interdisciplinaire Carnot de Bourgogne

Dissimilar laser beam welding between A5754 Al alloy and AZ31 Mg alloy with the plate thickness of 2 mm was investigated. Complex flow pattern characterized by a large volume of intermetallic compounds Al12Mg17 and Al3Mg2 is formed in the fusion zone. Microhardness measurement of the dissimilar welds presents an uneven distribution due to the complicated microstructure of the weld, and the maximum value of microhardness in the fusion zone is much higher than of the base materials.

Mots clés: Magnesium alloy; Aluminum alloy; Laser welding; Microstructure characterization; Dissimilar materials

Domaines: Matériaux

Sana Bannour, Michel Autric, Jean-Eric Masse, Simone Matteï, Hatem Mhiri. Microstructure and properties of welds between 5754 Al alloys and AZ31 Mg alloys using a Yb:YAG laser. 20th International Symposium on High Power Laser Systems & Applications, Aug 2014, China. pp.1-9. ⟨hal-01064015⟩