Effect of Annealing Temperature on Texture and Creep Anisotropy in Ti3Al2.5V Alloy
Effect of annealing temperature is investigated on texture and creep anisotropy in a thinwalled tubing of titanium alloy. Creep anisotropy is studied under equibiaxial loading using internally pressurized tubing superimposed with axial load while monitoring in-situ the time variations of both hoop and axial strains. Relatively weak hoop direction in the cold-worked material became stronger following complete recrystallization. The analyses of the data reveal that the anisotropy parameter, P which is the contractile strain ratio for testing along hoop direction increases from around 0.6 for the cold-worked material to around 1.5 following complete recrystallization. Results indicate that planar isotropy should occur following annealing at around 800K. Work on the effects of annealing on the textures and deformation microstructures is in progress. We summarize here results from some of our earlier work on a different lot of Ti3Al2.5V tubing in the recrystallized states where the ODFs were used in conjunction with crystal slip models to predict creep anisotropy.
Paul Van Houtte and Leo Kestens
K. Linga Murty et al., "Effect of Annealing Temperature on Texture and Creep Anisotropy in Ti3Al2.5V Alloy", Materials Science Forum, Vols. 495-497, pp. 1645-1652, 2005