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 beta solution treatment and water quenching (WQ) results in the alpha' martensite while the alpha+beta solution treatment and WQ leads to three-phase microstructures consisting of alpha , alpha and beta. Only alpha and beta 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. (C) 2001 Elsevier Science B.V. All rights reserved.