Dynamic mechanical analysis and thermomechanical stability of nanostructured commercially pure titanium in the temperature range of 20–600°C

Abstract

The thermomechanical stability of nanostructured (NS) commercially pure titanium is studied in the temperature range of 20–600°C using the method of dynamic mechanical analysis. It has been found that the maxima observed in the temperature dependence of the loss angle tangent (t = 350–600°C for the analyzed cyclic loading frequencies of 0.33–10 Hz) are of relaxation nature. The measured activation energies of microplastic deformation are close to the corresponding literary data on the experimental activation energies of the grain-boundary sliding under the studied conditions. The thermomechanical stability of NS VT1-0 titanium for medical application has been experimentally estimated up to 1.2 × 106 cycles of loading with cantilever bending at t = 100°C, which is substantially higher than the operating temperature (t = 37°C).