Les intermétalliques : des superalliages aux quasicristaux
J. Phys. IV France 06 (1996) C2-211-C2-216
Comparison of the Deformation Microstructures at Room Temperature in O and B2 Phases of a Ti2AlNb AlloyF. Popille and J. Douin
Laboratoire d'Etude des Microstructures (UMR 104 CNRS/ONERA), 29 avenue de la Division Leclerc, BP. 72, 92322 Châtillon Cedex, France
The dislocation microstructures in both O and B2 single phases of a Ti2AlNb alloy, deformed at room temperature, are reported. Slip systems activated during the deformation of each phase are determined using weak-beam electron microscopy and the correspondence between the deformation processes is made. It is shown that the better ductility of the B2 phase compared to the O phase is related to the number of activated slip systems.
© EDP Sciences 1996