РОЛЬ ХИМИЧЕСКОГО И ФАЗОВОГО СОСТАВОВ В ПРОЯВЛЕНИИ ЭЛЕКТРОПЛАСТИЧЕСКОГО ЭФФЕКТА

The nature of differently directed stress jumps, observed at stressdeformation diagrams at tension at room temperature subjected to pulse current in alloys of different physical nature was analyzed. The results of previous studies of electroplastic effect occurrence during rolling and tension in coarse-grain, ultrafine-grain and nanostructured titanium alloys with single-phase, two-phase and intermetallic structure were summarized. Electroplastic rolling allows forming ultrafinegrain and nanostructured states, increases deformability and strength of VT1-0, VT6, TiNi titanium alloys. It is shown that amplitude and direction of stress jumps are defined by competition of electroplastic effect (EPE) and phase transformation, and EPE is structurally-sensitive property. EPE decreases at structure refinement and even disappears in nanocrystalloid and amorphous states. Martensite transformation leads to deformability enhancement of TiNi.