Microstructures et propriétés mécaniques des alliages de type Duralumin du Breguet 765 n°504 64-PH : approche historique et sciences des matériaux

Abstract : Industrially produced since 1910 and used for the construction of Breguet XIV in 1916, the duralumins (Al-Cu-Mg alloys) are the first age-hardening aluminum alloys that were at the origin of the aeronautics development. Although Al-Zn-Cu alloys of the 7xxx family and composite materials are more widely used today, these Al-Cu-Mg alloys of the 2xxx family remain a reference material for aircraft structures. However, although it is an industrial material, with a large production of written documents, the archiving policy applied by manufacturers causes a loss of information. There is thus a difficulty to retrieve pertinent chemical and physical data of material used in aircraft construction, but also to understand the choices made about the material and process used by the manufacturers. The renovation of the Breguet 765 Sahara n°504 64-PH by the association Ailes Anciennes Toulouse is an opportunity to study aeronautical duralumins of the late 1950s. It is possible to recover elements need to be replaced before they are permanently lost, with the information contained therein. By comparing laboratory analysis with archival and current literature, it is possible to give a feedback on these ancient materials. We can compare what was done with what was originally planned in the design of the aircraft and complete the known data of these materials with current metallurgical technical analysis. These alloys can also be a first reference for aeronautical duralumins of the 1950s and contribute to the study of the long-term evolution of mechanical properties compared to minimum values ??required by the manufacturer.
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Audrey Cochard. Microstructures et propriétés mécaniques des alliages de type Duralumin du Breguet 765 n°504 64-PH : approche historique et sciences des matériaux. Matériaux. Université Paul Sabatier - Toulouse III, 2016. Français. ⟨NNT : 2016TOU30384⟩. ⟨tel-01760733⟩

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