Equiaxed α microstructure evolution in wrought Ti-10Al-1Zr-1Mo-1Nb alloy during annealing

Evolution of α microstructure on the thermomechanical treated Ti-10Al-1Zr-1Mo-1Nb alloy during annealing was studied. The solution-treated materials were groove-rolled or uniaxially compressed in α+β region and annealed at 1173 K. flow softening behavior crystal rotation platelets revealed an evolution deformation texture. volume fraction equiaxed grains increased annealing. Especially material a strain rate 1 s−1, developed within shorter duration than 1.8 ks. with higher rates promoted division fragmentation Transmission electron microscopy X-ray diffraction analyses employed to characterize dislocation components structure, where installed screw dislocations provided fine substructure high energy α/α boundaries platelets. triple junction consisting α/β may provide site for thermal grooving, which induces Therefore, is necessary processing develop