Mechanical property anisotropy of α (cph) and α″ (orthorhombic) phases in binary Ti-Nb alloys

Abstract

The present work describes the study of mechanical properties anisotropy of two binary alloys namely, Ti-8Nb and Ti-12Nb in hot rolled condition. These alloys were unidirectionally hot rolled to 80 % reduction at 800 °C and subsequently air cooled. The alloys Ti-8Nb and Ti-12Nb consist of mainly α and α ″ phases, respectively and small volume fractions of β phase in hot rolled condition. Both the alloys exhibit non-basal main texture components. The ODF plots display weak, continuous and inhomogeneous [0001]∥ND and [001]∥ND fibres for the alloys Ti-8Nb and Ti-12Nb, respectively. In plane anisotropy (AIP) and anisotropy index (δ) were calculated from tensile results. Finally, an attempt has been made to correlate in plane anisotropy and yield locus to that of texture present in the hot rolled materials. © (2012) Trans Tech Publications, Switzerland.