The effect of severe plastic deformation and subsequent annealing on the structure and mechanical properties of titanium alloy PT-3V

摘要

The effect of severe plastic deformation by multi-axial pressing followed by thermal treatment on the structure and mechanical properties of titanium alloy PT-3V (4. 66% Al:1. 92% V) has been investigated. Submicrocrystalline structure formation is shown to dramatically improve the mechanical properties of the alloy at room temperature and to decrease the superplastic flow temperature interval by 250-300 K. Low-temperature annealing of the material in a submicrocrystalline state is found to cause further increase in the yield strength and ultimate strength as compared to the preannealing level, with the strain at fracture being nearly doubled.