On the design of new β-metastable titanium alloys with improved work hardening rate thanks to simultaneous TRIP and TWIP effects

In this work, preliminary results are presented on attempts to develop a new family of titanium alloys with high ductility induced by combined transformation-induced plasticity and twinning-induced plasticity effects. Mechanical tests carried out on a binary beta-metastable Ti-12 wt.% Mo alloy designed by a formulation strategy based on the d-electron alloy design show a very high work hardening rate. X-ray diffraction, electron backscattered diffraction and transmission electron microscopy reveal the mechanical activation of twinning and of alpha', alpha '' and omega) phases. (C) 2012 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.