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 me tallography. Lattice parameters of the constituent phases in as cast and di fferent heat-treated conditions have been calculated. The beta solution tre atment and water quenching (WQ) results in the alpha' martensite while the alpha+beta solution treatment and WQ leads to three-phase microstructures c onsisting of alpha ", alpha and beta. Only alpha and beta phases are observ ed under aged condition irrespective of the prior solution treatment condit ions. The effect of various heat-treatments on the hardness of the alloy ha s been presented. (C) 2001 Elsevier Science B.V. All rights reserved.