Effect of thermomechanical processing on microstructure of a Ti–13Nb–13Zr alloy

This work describes the effect of mechanical working and heat treatment on the microstructure of the alloy Ti–13Nb–13Zr using X-ray diffraction and metallography. Lattice parameters of the constituent phases in as cast and different heat-treated conditions have been calculated. The β solution treatment and water quenching (WQ) results in the α′ martensite while the α+β solution treatment and WQ leads to three-phase microstructures consisting of α″, α and β. Only α and β phases are observed under aged condition irrespective of the prior solution treatment conditions. The effect of various heat-treatments on the hardness of the alloy has been presented.