Influence of conditions of dynamic experiment for value of dissipated energy in submicrocrystalline titanium

In paper is devoted to an experimental study of mechanical and thermodynamical characteristics of submicrocrystallyne titanium under dynamic loading using split Hopkinson pressure bar. Temperature kinetics during deformation process was recorded using infrared thermography based on CEDIP SC 5000 camera (spectral range 3 - 5 ®m, temperature sensibility 0.025 K, frame rate 4 kHz). Experimental results presented [1] shows that part of cumulative energy in submicrocrystallyne titanium is more than in coarse grain titanium, and equals 0.8 in wide range of strain rates. This paper investigates the influence of the dynamic features of the experiment ( friction conditions on the ends of the rods) on the value of the dissipated energy and the features of the deformation process. The result shows that the additional lubrication doesn`t significantly effect on the integral characteristics of material deformation process (dissipated energy value).