Microstructure and Thermal Stability in CP Titanium Processed by Electroplastic Rolling

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Ultrafine-grained (UFG) CP titanium (Grade-4) sample was processed by electroplastic rolling (EPR) at room temperature which was compared to a specimen processed by conventional cold rolling (CR). EPR was performed using pulsed unidirectional current with a current density of 95 A/mm2, pulse duration of 10-4 s and frequency of 1000 Hz. It was found that the sample processed by EPR has slightly higher dislocation density and smaller crystallite size than for the CR specimen resulting in a higher tensile strength for the former specimen. In the case of EPR sample, the relative fraction of dislocations is lower than for CR specimen. During annealing the relative fraction of dislocations decreased for both samples which can be explained by the fact that the dislocations have larger Burgers-vector and consequently higher formation energy than the other two types.

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Periodical:

Edited by:

Pavel Šandera

Pages:

215-218

DOI:

10.4028/www.scientific.net/KEM.465.215

Citation:

J. Gubicza et al., "Microstructure and Thermal Stability in CP Titanium Processed by Electroplastic Rolling", Key Engineering Materials, Vol. 465, pp. 215-218, 2011

Online since:

January 2011

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$35.00

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