Electrostimulated plasticity of titanium under tension
O.E. Korolkov, A.A. Misochenko, V.V. Stolyarov
Mechanical Engineering Research Institute of RAS
DOI: 10.26456/pcascnn/2024.16.658
Original article
Abstract: The paper confirms the possibility of electrical stimulation of plasticity, previously discovered in ultrafine-grained titanium. The regimes of pulsed current during tension have been experimentally determined, which make it possible to significantly increase the elongation to failure in commercially pure coarse-grained titanium Grade 4. It is shown that the introduction of single current pulses with an amplitude density of 300-400 A/mm2 with a variable duration from 100 to 1000 μs and a duty cycle from 1000 to 10000 during tension helps to reduce the ultimate tensile strength from 845 to 750 MPa and simultaneously increase the elongation from 10 to 21%. Structural studies using optical microscopy have shown that tension accompanied current does not affect the average grain size, but leads to reducing large particles and a partial dissolution of small inclusions. The results of structural studies, temperature measurements and features of deformation behavior when the current is turned off confirm the predominantly athermal nature of the increase in plasticity.
Keywords: electroplastic effect, tension, pulsed current, titanium, deformation behavior, plasticity, microstructure, stress relaxation
- Oleg E. Korolkov – Researcher, Mechanical Engineering Research Institute of RAS
- Anna A. Misochenko – PhD, Senior Researcher, Mechanical Engineering Research Institute of RAS
- Vladimir V. Stolyarov – Dr. Sc., Chief Researcher, Mechanical Engineering Research Institute of RAS
Reference:
Korolkov, O.E. Electrostimulated plasticity of titanium under tension / O.E. Korolkov, A.A. Misochenko, V.V. Stolyarov // Physical and chemical aspects of the study of clusters, nanostructures and nanomaterials. — 2024. — I. 16. — P. 658-669. DOI: 10.26456/pcascnn/2024.16.658. (In Russian).
Full article (in Russian): download PDF file
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