Dynamic mechanical behavior of pure titanium

The compressive dynamic mechanical behavior of α-titanium with more impurities was carried out using a Split–Hopkinson pressure bar (SHPB). A cylindrical specimen was set between the incident and transmitted bars and impacted at high strain rate (∼103 s−1) The test revealed significant rate sensitivity of the fracture and linear strain hardening, and the critical strain rate at fracture was determined to be 3000 s−1. The failure model was by shearing. Microscopic examinations showed that a large amount of twins were formed during deformation which increased with strain and strain rate. In addition, a developing shear band was found. The experimental relationship between stress and strain was compared with prediction using Zerilli–Amstrong constitutive equation and the related parameters were determined.