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OwnerRuslan Zufarovich Valiev, Irina Petrovna Semenova +2inventors
InventorsRuslan Zufarovich Valiev, Irina Petrovna Semenova, Evgeniya Borisovna Yakushina, Gul'naz Khalifovna Salimgareeva
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Commercially pure titanium having UFG structure and enhanced mechanical and biomedical characteristics has nanocrystalline alpha-phase grains with a hexagonal close-packed lattice, in which the share of grains with a size of 0.1 . . . 0.5 μm and a grain shape coefficient of no more than 2 in the mutually perpendicular planes makes no less than 90%, over 60% of the grains having high-angle boundaries disoriented in relation to the adjacent grains by the angles from 15 to 90°. The method for making a rod of the material provides for equal-channel angular pressing of a billet at T≦450° C. with the total accumulated true strain e≧4 to effect severe plastic deformation of the billet and subsequent thermomechanical treatment with a gradual decrease of the temperature in the range of 450 . . . 350° C. and the strain rate of 10−2 . . . 10−4 s−1 with the strain degree from 40 to 80% to effect additional plastic deformation.
Nanostructured commercially pure titanium for biomedicine presenting a nanocrystalline alpha-phase grain structure with a hexagonal close-packed lattice wherein no less than 90% of the grains by volume belong to the grains with a size of 0.1 . . . 0.5 μm and with a grain shape coefficient no more than 2 in mutually perpendicular planes and wherein over 60% of the grains belong to the grains having high-angle boundaries disoriented in relation to the adjacent grains by the angles from 15 to 90°.
A method for fabricating a rod of commercially pure nanostructured titanium for biomedicine comprising the steps of:
A method for fabricating a rod of commercially pure nanostructured titanium for biomedicine comprising:
Dependencies are inferred from the claim text.