05.04.2023
Technology for producing nanostructured and submicrocrystalline titanium for medical purposes
Technology and equipment have been developed for the pilot production of workpieces (rods with a diameter of 5.5-10.0 mm and a length of 1 m or more) of nanostructured and submicrocrystalline titanium VT1-0. The technology includes deformation processing of the initial titanium workpiece using a combined method of intense plastic deformation, consisting of repeated uniaxial pressing in a mold or abc pressing, multi-pass rolling and low-temperature annealing. This technology ensures the achievement of a given nanostructural or submicrocrystalline state in titanium with a uniform structure throughout the entire volume of the workpiece and with a characteristic grain-subgrain structure size of up to 100 nm or less and an increase in the mechanical properties of titanium to the level of mechanical properties corresponding to titanium alloys for medical use such as VT6, VT16
Titanium VT1-0 (VT1-00) in the nanostructured / submicrocrystalline state has mechanical properties comparable to the properties of alloyed titanium alloys.
Mechanical characteristics of titanium and titanium alloys
|
Material |
S0.2MPa |
SB, MPa |
S0, MPa |
d, % |
Hm, MPa |
|
Large-crystalline titanium VT1-0 |
270 |
400 |
280 (105 cycles) |
23 |
1700 |
|
Submicrocrystalline titanium VT1-0 |
900 |
1000 |
- |
- |
2700 |
|
Nanostructured titanium VT1-0 |
1100 |
1160 |
280 (2×106 cycles) |
6 |
3300 |
|
Titanium Grade 4 (USA) |
480 |
550 |
- |
15 |
4200 |
|
Alloy VT-6 |
1010 |
1100 |
570 |
>6 |
3500 |
|
Alloy VT-16 |
1000 |
1050 |
- |
>10 |
3400 |
S0.2 - yield strength; SB - tensile strength; d - tensile plasticity; S0 - endurance limit; Hm - microhardness.
The proposed technology makes it possible to obtain a nanostructured and submicrocrystalline state in titanium using widely used industrial equipment (presses, stamps, rolling mills, etc.) with a uniform structure throughout the entire volume of the workpiece. Titanium blanks with nanostructured and submicrocrystalline states have dimensions sufficient for the manufacture of various implants for a wide range of medical purposes. Nanostructured and submicrocrystalline titanium VT1-0 does not contain alloying elements toxic to the body and has high mechanical properties comparable to titanium alloys used in medicine (VT6, VT16).
Area of application
Production of implants for dental implantology, maxillofacial surgery, traumatology and other possible areas of application.
The main advantages of nanostructured and submicrocrystalline