Influence of pulse current modes on ultrafine-grained titanium mechanical tensile behavior

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Abstract

deformation behavior and mechanical properties in tension of ultrafine-grained technically pure Grade 4 titanium is presented. The pulse current modes, which contribute to increase of tensile ductility without changing the microstructure of considered material have been studied. The minimum pulse duration necessary for the manifestation of the electroplastic effect is shown.

About the authors

O. E. Korolkov

ИМАШ РАН

Author for correspondence.
Email: journal@electronics.ru

научный сотрудник 

Russian Federation

M. S. Pugachev

ИМАШ РАН

Email: journal@electronics.ru

научный сотрудник 

Russian Federation

A. V. Polyakov

Уфимский университет науки и технологий

Email: journal@electronics.ru

кандидат технических наук, старший научный сотрудник 

Russian Federation, Уфа

V. V. Stolyarov

ИМАШ РАН

Email: journal@electronics.ru

доктор технических наук, главный научный сотрудник 

Russian Federation

References

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Supplementary files

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2. Fig. 1. Fine microstructure (a) and microdefraction pattern (b) of UFG Grade 4

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3. Fig. 2. Shape and dimensions of tensile specimens

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4. Fig. 3. Test setup: 1 – pulse current generator; 2 – oscilloscope; 3 – captures; 4 – sample. The inset shows a diagram of the pulse current oscillogram.

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5. Fig. 4. Block diagram of the sequence of changing the current mode during stretching with a constant current density

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6. Fig. 5. Microhardness test zones: 1 – neck; 2 – working zone; 3 – head

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7. Fig. 6. Stress-strain curves: 1 – no current; 2 – j = 200 A/mm2; 3 – j = 400 A/mm2

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8. Fig. 7. Effect of pulse current density on microhardness

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9. Fig. 8. Fractographic images of the fracture surface under tension: a – without current, b – j = 200 A/mm2, c – j = 400 A/mm2. The square frame marks the pores, the round frame – the cups

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Copyright (c) 2024 Korolkov O.E., Pugachev M.S., Polyakov A.V., Stolyarov V.V.