Abstract
This study investigates the consolidation of pre-alloyed Ti–6Al–4V powder through thermomechanical processing that involves cold isostatic pressing, sintering, hot pressing and extrusion. The microstructural evolution, oxygen pick-up and tensile properties attained after each major consolidation step reveal that there was a significant oxygen pick-up during de-binding/sintering, hot pressing had improved strength/ductility by eliminating porosity and extrusion resulted in a relatively fine lamellar structure. Overall, as-extruded material had an oxygen content of 0.22 wt-%, impact toughness of 21 J, yield strength of 971 MPa, ultimate strength of 1124 MPa and ductility of 9–11% which is comparable to corresponding values reported in the literature. An investigation of fracture surfaces along with crack propagation behaviour highlights that ductile fracture was the predominant mode of failure.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
