A beta-titanium alloy with extra high strain-hardening rate: Design and mechanical properties

摘要

In this paper, a new beta-metastable titanium alloy, based on the Ti-Cr-Sn system, displaying both an extremely high work hardening rate and a uniform deformation larger than 035, was designed and successfully tested. The compositional design was guided through a stability mapping approach based on the "d-electron design method" and using an unexploited region of the Bo/Md map. Detailed analysis of deformation mechanisms shows combined transformation-induced plasticity (TRIP) and twinning-induced plasticity (TWIP) effects, resulting in a complex network of microstructural features and giving rise to marked kinematic hardening. (C) 2015 Elsevier Ltd. All rights reserved.