Compression Superplasticity of Ultrahigh Carbon Steel in Electric Field

Abstract:

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Taking 1.4%C and 1.6%C ultrahigh carbon steels (UHCSs) with ultra-fine structures developed through thermo-mechanical processing as research objects, the influences of superplastic deformation conditions and electric field on compression superplasticity were conducted without electric field and with electric field. The experimental results indicate that 1.4%C and 1.6%C UHCSs have respectively superplasticity or electro-superplasticity under the conditions of deformation temperature of 800°C, the initial strain rate of 0.75-3.75×10-4 s-1 and deformation temperature of 780 °C, the initial strain rate of 0.5-5.0×10-4 s-1 and the suitable external electric field. Its strain rate sensitivity are respectively 0.32 and 0.46.When the electric field intensity of 3 kV/cm in the manner of the specimen connected to positive terminal, the steady flow stress of 1.6%C UHCS decreases more than 10.5% as compared with electric field intensity of 0 kV/cm.

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Periodical:

Edited by:

Jing Tao Wang

Pages:

177-183

DOI:

10.4028/www.scientific.net/MSF.682.177

Citation:

K. K. Zhang et al., "Compression Superplasticity of Ultrahigh Carbon Steel in Electric Field", Materials Science Forum, Vol. 682, pp. 177-183, 2011

Online since:

March 2011

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$35.00

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