Abstrakt
Recently developed metastable alloy Ti-35.3Nb-7.3Zr-5.7Ta-0.7O (wt.%) abbreviated TNZTO is unique in its high oxygen content and exhibits promising properties for successful use in biomedicine, namely for total endoprostheses and bone fixation. As-cast material is not fully homogeneous; it shows dendritic structure and high density of micro-sized pores.
High O content causes increased strength and, interestingly, good ductility with elongation > 12 %. Tensile tests were performed on the as-cast material and material after high-temperature die forging.
As-cast material showed yield stress > 900 MPa, whereas yield stress of die-forged material exceeds 1100 MPa. The microhardness tests were also performed on the as-cast and die-forged conditions.
Strength values exceed the most used Ti-6Al-4V alloy and therefore the studied alloy is very perspective for manufacturing load-bearing orthopaedic implants.