Mechanical properties and effects of internal friction in cold-rolled ultra-finegrained VT1-0 alloy

摘要

Structure and properties of VT1-0 alloy subjected to equichannel angular press forming and cold rolling have been studied. A comparative analysis of mechanical properties, amplitude-dependent internal friction, and alloy structure in large-grain cold-rolled state was carried out. It was shown that ultrafine-grained structure providing for high properties is formed under equichannel angular press forming. Distinctive features of structural changes in cold-rolled ultrafine-grained alloy were found during successive isochronous annealing processes. The effects of amplitude-dependent internal friction, which reflects changing the mobility of dislocation group and the level of residual stresses in ultrafine-grained state during annealing, were found.