Plastic Deformation Behavior and Mechanisms of Commercial Pure Titanium under Tension and Compression

By tensile and compressive tests of commercial pure titanium (CP-Ti), the relationships between tension and compressive stress-strain at various deformation temperatures and strain rates were obtained. Then, the influences of deformation temperatures, tension/compression loading paths and strain rates on the stress-strain relationships were investigated. With Zener-Hollomon model, the influencing rules of the temperatures and strain rates on work hardening were achieved and the compressive deformation processing map was constructed. Based on the EBSD analysis, the grain orientations of CP-Ti were obtained and the plastic deformation mechanisms for tension and compression were clarified: the slipping dominates the tension plastic deformation and the mechanism of compression plastic deformation is mainly slipping-twinning-slipping.