THE ROLE OF CHEMICAL AND PHASE COMPOSITION IN ELECTROPLASIC EFFECT OCCURRENCE
https://doi.org/10.17073/0368-0797-2016-6-420-423
Abstract
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.
Keywords
tension,
stress,
rolling,
alloys,
pulse current,
electroplastic effect,
plastic deformation,
nanostructure
About the Author
V. V. Stolyarov
Blagonravov Institute of Machines Science of the Russian Academy of Sciences, Moscow, Russia
Russian Federation
Russian Federation
Dr. Sci. (Eng.), Professor, Chief Researcher
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Review
For citations:
Stolyarov V.V. THE ROLE OF CHEMICAL AND PHASE COMPOSITION IN ELECTROPLASIC EFFECT OCCURRENCE. Izvestiya. Ferrous Metallurgy. 2016;59(6):420-423. (In Russ.) https://doi.org/10.17073/0368-0797-2016-6-420-423
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