초록 ▼

Small amounts of rare earth elements are added to an aaaa

Small amounts of rare earth elements are added to an aaaa

대표청구항 ▼

A titanium base alloy containing, a IIIA, a IVA metal, and a rare earth metal having a boiling point higher than the melting point of titanium, said alloy having been rapidly quenched at a rate which permits formation of spherical precipitates in the 50-100 Angstrom diameter range from the liquid fo

A titanium base alloy containing, a IIIA, a IVA metal, and a rare earth metal having a boiling point higher than the melting point of titanium, said alloy having been rapidly quenched at a rate which permits formation of spherical precipitates in the 50-100 Angstrom diameter range from the liquid form of the alloy to prevent segregation, said alloy containing a homogeneous compound of the rare earth, a IIIA, and a IVA metal in the form of said spherical precipitates, at least some of the spherical precipitates having diameters of 50-100 Angstroms prior to any annealing step. A method of increasing the strength of an alpha-titanium or near alpha-titanium alloy comprising adding to said alloy a IIIA, IVA metal and a rare earth metal having a boiling point higher than the melting point of titanium, rapidly solidifying the resulting alloy at a rate which permits formation of spherical precipitates in the 50-100 Angstrom diameter range from the liquid form of the alloy to prevent segregation whereby said allow contains a homogeneous compound of the rare earth, a IIIA and a IVA metal in the form of said spherical precipitates, at least some of the spherical precipitates having diameters of 50-100 Angstroms prior to any annealing step, and heat treating the rapidly solidified alloy in an oxygen free atmosphere.