Commercial purity Ti is an important candidate material for orthopedic and dental
implants because of its high specific strength, good corrosion resistance and excellent
biocompatibility. However, for biomedical applications as a replacement for Ti-6Al-4V alloy that is
currently used, improvement in strength of CP Ti is necessary. This can be achieved by using severe
plastic deformation (SPD) processes like equal channel angular pressing (ECAP) at warm working
temperatures followed by conventional processing at room temperatures. This requires adequate
workability after ECAP. In this study, the workability of CP Ti after warm ECAP has been
investigated. Specimens of CP Ti, 17 mm in diameter, were extruded using processing route Bc
through an ECAP die with an angle of 120◦ between the two intersecting channels and at a
temperature of approximately 400oC. Workability testing was carried out using collar type
compression specimens by upsetting the specimens between flat platens till the onset of cracking.
Workability diagrams have been plotted as a function of axial and hoop strains at failure. The
results show that processing by ECAP lead to only minor reductions in workability of CP Ti. The
tensile strength is enhanced considerably by this process.
Simulated Analysis of Ti-6Al-4V processed through Equal Channel Angular Pressing for Biomedical applications
