Straining mechanisms in aluminium alloy 6056. In-situ investigation by transmission electron microscopy

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

1 CEMES - Centre d'élaboration de matériaux et d'études structurales
2 CROMeP - Centre de Recherche Outillages, Matériaux et Procédés

TEM in-situ straining tests, performed in precipitation hardened aluminium alloy 6056-T6, show that precipitates are sheared or by-passed by dislocations. By-passing, assisted by dislocation cross-slip, results in the formation and stress-induced spreading of non-planar loops. The relationship between those elementary mechanisms and the mechanical properties of the alloy is discussed.

Mots clés: Aluminium alloys; Deformation micro-mechanisms; In-situ straining experiments; Precipitation hardening

Domaines: Sciences de l'ingénieur [physics]

François Delmas, Marie Vivas, Philippe Lours, Marie-José Casanove, Alain Couret, et al.. Straining mechanisms in aluminium alloy 6056. In-situ investigation by transmission electron microscopy. Materials Science and Engineering: A, 2003, 340 (1-2), pp.286-291. ⟨10.1016/S0921-5093(02)00184-3⟩. ⟨hal-01716122⟩