The Microstructure, Texture and Mechanical Properties of Friction Stir Welded Aluminum Alloy

The microstructure and texture of 7075-T6 FSW weld with optimal parameters are investigated using optical microscopy, electron back scatter diffraction and neutron diffraction. The mechanical properties are characterized through microhardness, nanoindentation and ultrasonic tests. The friction stir...

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Bibliographic Details
Published in:Russian journal of non-ferrous metals 2020-09, Vol.61 (5), p.523-533
Main Authors: Saliha Gachi, Aissani, Mouloud, Baudin, Thierry, Helbert, Anne.Laure, Brisset, François, Gautrot, Sébastien, Mathon, Marie-Hélène, Bradai, Djamel, Boubenider, Fouad
Format: Article
Language:English
Subjects:
Aluminum base alloys
Base metal
Chemistry and Materials Science
Electron backscatter diffraction
Engineering Sciences
Friction stir welding
Materials and structures in mechanics
Materials Science
Mechanical properties
Mechanics
Metallic Materials
Microhardness
Microstructure
Modulus of elasticity
Nanoindentation
Neutron diffraction
Nondestructive testing
Optical microscopy
Optical properties
Physical Metallurgy and Heat Treatment
Recrystallization
Texture
Ultrasonic methods
Ultrasonic testing
Ultrasonic tests
Welding parameters
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Summary:The microstructure and texture of 7075-T6 FSW weld with optimal parameters are investigated using optical microscopy, electron back scatter diffraction and neutron diffraction. The mechanical properties are characterized through microhardness, nanoindentation and ultrasonic tests. The friction stir welding is performed at a nominal rotational speed of 1400 rpm and a traverse speed of 60 mm/min. The nugget zone contained fine, equiaxed and fully recrystallized grains. The texture of the base material mainly consisted of Cube and rotated Goss components. However, in the nugget zone, the dominant texture components were B and among common shear orientations. Elastic modulus was measured by ultrasonic and nanoindentation methods. The ultrasonic method being nondestructive, easy, inexpensive and fast. It is found that a little increase of Young modulus is observed in nugget zone compared to base metal.
ISSN:1067-8212
1934-970X
DOI:10.3103/S1067821220050041