Regular Features of Stage Formation in the Stress-strain Curves and Microstructure in the Zone of Fracture of Coarse-Grained and Ultrafine-Grained Titanium and Zirconium Alloys

摘要

The stage-like character of the stress-strain curves and microstructure in the fracture zone of coarse-grained and ultrafine-grained specimens of the VT1-0 and Zr-1Nb alloy specimens under quasistatic loading are investigated using the temperature curves obtained by the method of IR-imaging. New experimental data are obtained, which provide evidence on a considerable influence of the ultrafine-grained state on the evolution of plastic deformation and fracture in the VT1-0 and Zr-1Nb alloys.