Effects of rolling reduction on mechanical properties anisotropy of commercially pure titanium: Fid-Bau Portal

Effects of rolling reduction on mechanical properties anisotropy of commercially pure titanium

Nasiri-Abarbekoh, H. / Ekrami, A. / Ziaei-Moayyed, A.A. / Shohani, M.

Highlights ► Investigation into the effects of texture and microstructure evolution on the mechanical properties anisotropy of commercially pure titanium. ► In low levels of deformation the microstructure has fewer significant effects on the anisotropic response of mechanical properties. ► Up to 50% increase in rolling reduction resulted in the activation of similar deformation systems and isotropic mechanical response. ► Anisotropy was observed at high levels of deformation due to the split distribution of basal texture and mechanical fibering.

Abstract In the present work tensile and tear properties of commercially pure titanium with different rolling reductions and specimens directions were investigated. The experimental results showed that in low levels of deformation the microstructure refining and mechanical twins have fewer significant effects on the anisotropic behavior of both tear and tensile properties and the crystallographic texture controls the mechanical properties anisotropy. The increase in rolling reduction up to 50% led to the formation of strong-basal texture and resulted in the activation of almost same deformation systems and isotropic mechanical response. However, at high levels of deformation, due to the split distribution of basal texture and mechanical fibering, the anisotropy was again observed. It was found that loading modes strongly affect the dominant mechanisms which control the mechanical properties anisotropy.