Transmission electron microscopy study of precipitate morphology and precipitate overcoming processes in aluminum alloy 6056 T6

Marie Vivas (1) , Philippe Lours (1) , Christophe Levaillant (1) , Alain Couret (2) , Marie-José Casanove (2) , Armand Coujou (2)

1 Centre Matériaux - Ecole des Mines Albi-Carmaux
2 CEMES - Centre d'élaboration de matériaux et d'études structurales

High resolution electron microscopy and in situ straining experiments are performed on aluminum alloy 6056 T6 to charaterize the morphology of precipitates and the processes of precipitate overcoming by the dislocations. Two types of precipitates (needles and laths) are identified. They are found to be sheared by the dislocations and the maximum force precipitates can sustain before being sheared is calculated.

Mots clés: Aluminum alloy 6056 T6; Precipitate morphology; Precipitate shearing; In situ straining experiments

Domaines: Sciences de l'ingénieur [physics]

Marie Vivas, Philippe Lours, Christophe Levaillant, Alain Couret, Marie-José Casanove, et al.. Transmission electron microscopy study of precipitate morphology and precipitate overcoming processes in aluminum alloy 6056 T6. Materials Science and Engineering: A, 1997, 234, pp.664-667. ⟨10.1016/S0921-5093(97)00274-8⟩. ⟨hal-01701684⟩