High-speed deformation of titanium during dynamic channel-angular pressing

Abstract A titanium sample was deformed using dynamic channel-angular pressing using a shock loading technique. The structural changes and the cracking behavior occurring during the high-speed deformation were studied by metallographic inspection. A geometrical method of determining the amount of uniform shear strain upon equal-channel angular pressing is suggested. The localized deformation leads to the appearance of adiabatic shear bands. Two types of adiabatic shear bands were observed that intersect the sample in either the longitudinal or transverse directions. The occurrence of recrystallization inside the bands indicates local heating of the material to 770 – 870 K. The morphology of the adiabatic shear bands can be described as a multilayer structure. The width of bands is up to 100 m.