The Microstructure, Texture and Mechanical Propertiesof Friction Stir Welded Aluminum Alloy

Type : Publication
Auteur(s) :  Saliha Gachi, Mouloud Aissani, Thierry Baudin, Anne.Laure Helbert, François Brisset, Sébastien Gautrot, Marie-Hélène Mathon, Djamel Bradai, Fouad Boubenider
Année :  2020
Domaine : Aéronautique
Revue : Russian Journal of Non-Ferrous Metals
Résumé en PDF :  (résumé en pdf)
Fulltext en PDF :  (.pdf)
Mots clés :  Aluminum alloy, FSW, microstructure, texture, Microhardness, Young modulus

Résumé : 

The microstructure and texture of 7075-T6 FSW weld with optimal parameters are investigatedusing optical microscopy, electron back scatter diffraction and neutron diffraction. The mechanical proper-ties are characterized through microhardness, nanoindent ation and ultrasonic tests. The friction stir weldingis performed at a nominal rotational speed of 1400 rpm and a traverse speed of 60 mm/min. The nugget zonecontained fine, equiaxed and fully recrystallized grains. The texture of the base material mainly consisted ofCube and rotated Goss components. However, in the nugget zone, the dominant texture components were Band among common shear orientations. Elastic modulus was measured by ultrasonic and nanoindentationmethods. The ultrasonic method being nondestructive, easy, inexpensive and fast. It is found that a littleincrease of Young modulus is observed in nugget zone compared to base metal.