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Genèse des microstructures lors du soudage par friction malaxage d'alliages d'aluminium de la série 2000 & 5000 et comportement mécanique résultant

Abstract : The 2024 alloy (Al-Cu-Mg) is used for minimizing the weight of structural components in the transportation industry. However, this alloy is not easy to weld by traditional techniques. Friction stir welding (FSW) is a recently developed solid state process which removes the solidification defects. In this study, the microstructures of FSW welds of this alloy were finely characterized by SAXS, DSC, TEM, SEM, EBSD and optical microscopy. In order to highlight the interactions between deformation, precipitation and recrystallisation, which all take place during the welding of the 2024 alloy, model experiments were carried out as well as a comparative study between the alloys 5251 and 2024. The combination of the welding characterisation and the model experiments allow to define the metallurgical phenomena controlling the mechanical strength of the welded joints and their microstructure. In addition, a detailed characterisation of the mechanical behaviour of the welded joints was carried out, validated by a finite element model.
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https://tel.archives-ouvertes.fr/tel-00008244
Contributor : Cécile Genevois <>
Submitted on : Tuesday, January 25, 2005 - 11:12:53 AM
Last modification on : Friday, June 26, 2020 - 2:04:02 PM
Long-term archiving on: : Friday, April 2, 2010 - 8:54:31 PM

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  • HAL Id : tel-00008244, version 1

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Cécile Genevois. Genèse des microstructures lors du soudage par friction malaxage d'alliages d'aluminium de la série 2000 & 5000 et comportement mécanique résultant. Matériaux. Institut National Polytechnique de Grenoble - INPG, 2004. Français. ⟨tel-00008244⟩

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