A novel Ti–6Al–4V alloy microstructure with very high strength and good ductility

This paper reports a novel microstructure consisting of fine and oxygen hardened equiaxed α grains and fine equiaxed transformed β grains hardened by nanometer sized α aciculars, formed by solution treatment, quenching and aging of a Ti–6Al–4V (wt.%) alloy with a relatively high oxygen content of 0.52wt.%, and produced by powder compact forging. The microstructure renders the alloy with a very high tensile yield strength of 1352.4MPa, ultimate tensile strength of 1421.7MPa and elongation to fracture of 7.2%.