Titanium segregation mechanism in deformed vanadium-titanium alloys

Deformed V-Ti alloys with 0.3-5 at.%Ti have been characterized by transmiss ion electron microscopy and X-ray diffraction. A mechanism for Ti segregati on during annealing, related to the formation of deformation twins, has bee n identified. Energy-dispersive X-ray spectroscopy indicates strong local c hanges in Ti content along the twins. Samples post-deformation annealed at 1473 K show Ti segregation and the formation of Ti-rich precipitates which have been identified using electron microdiffraction and X-ray spectroscopy . X-ray diffraction measurements reveal changes in the lattice parameter of the alloys induced by the Ti segregation and the precipitation processes.