https://sam.ensam.eu:443 The DSpace digital repository system captures, stores, indexes, preserves, and distributes digital research material. Wed, 15 Apr 2026 23:01:16 GMT 2026-04-15T23:01:16Z http://hdl.handle.net/10985/6857 The influence of position in overlap joints of Mg and Al alloys on microstructure and hardness of laser welds BANNOUR, Sana; ABDERRAZAK, Kamel; MATTEI, Simone; AUTRIC, Michel; MHIRI, Hatem; MASSE, Jean-Eric Structure and properties of laser beam welding zone of dissimilar materials, AZ31 magnesium alloy and A5754 Aluminum alloy, are investigated. The microstructure and quality of the Mg/Al weld were studied by metallography, microhardness and optical microscopy. Differences in physical and mechanical properties of both materials, magnesium and aluminum, affect weldability and resistance of this combination, and lead to the formation of intermetallic compounds in the welded metal. Tue, 01 Jan 2013 00:00:00 GMT http://hdl.handle.net/10985/6857 2013-01-01T00:00:00Z BANNOUR, Sana ABDERRAZAK, Kamel MATTEI, Simone AUTRIC, Michel MHIRI, Hatem MASSE, Jean-Eric Structure and properties of laser beam welding zone of dissimilar materials, AZ31 magnesium alloy and A5754 Aluminum alloy, are investigated. The microstructure and quality of the Mg/Al weld were studied by metallography, microhardness and optical microscopy. Differences in physical and mechanical properties of both materials, magnesium and aluminum, affect weldability and resistance of this combination, and lead to the formation of intermetallic compounds in the welded metal. http://hdl.handle.net/10985/8442 Excimer laser treatment of ZE41 magnesium alloy for corrosion resistance and microhardness improvement KHALFAOUI, Walid; VALÉRIO, Eric; AUTRIC, Michel; MASSE, Jean-Eric A laser surface melting treatment (LSMT) was performed on a ZE41 Mg-alloy using an excimer KrF laser. The laser-melted layer depth depends on the laser scan speed. The morphology and the microstructure of the laser-melted surface were characterized, thanks to the scanning electron microscopy (SEM). The melted Mg-alloy presented a homogenous distribution of the alloying elements in the magnesium matrix. The laser surface melting treatment increased the microhardness of the ZE41 Mg-alloy and improved its corrosion resistance. We would like to acknowledge the financial support of the ‘‘Conseil regional de PACA’’ and Protection des Metaux d’Arenc). The authors are grateful to PMA’s engineers Ms. E. Castellan, Ms. A. Gonthier and Mr. F. Miretti for their help and assistance with the salt-spray tests Fri, 01 Jan 2010 00:00:00 GMT http://hdl.handle.net/10985/8442 2010-01-01T00:00:00Z KHALFAOUI, Walid VALÉRIO, Eric AUTRIC, Michel MASSE, Jean-Eric A laser surface melting treatment (LSMT) was performed on a ZE41 Mg-alloy using an excimer KrF laser. The laser-melted layer depth depends on the laser scan speed. The morphology and the microstructure of the laser-melted surface were characterized, thanks to the scanning electron microscopy (SEM). The melted Mg-alloy presented a homogenous distribution of the alloying elements in the magnesium matrix. The laser surface melting treatment increased the microhardness of the ZE41 Mg-alloy and improved its corrosion resistance. http://hdl.handle.net/10985/8516 Microstructure and properties of welds between 5754 Al alloys and AZ31 Mg alloys using a Yb:YAG laser BANNOUR, Sana; AUTRIC, Michel; MATTEI, Simone; MHIRI, Hatem; MASSE, Jean-Eric 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. The authors wish to thank Mr. Henri ANDRZEJEWSKI for his technical assistance in laser experiments. The authors wish to place their sincere thanks to Professor Philippe BOURNOT and Dr. Eric VALERIO for helpful discussions. Wed, 01 Jan 2014 00:00:00 GMT http://hdl.handle.net/10985/8516 2014-01-01T00:00:00Z BANNOUR, Sana AUTRIC, Michel MATTEI, Simone MHIRI, Hatem MASSE, Jean-Eric 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.