Study of the Plastic Deformation in Nanocrystalline and Ultrafine Iron and Carbon Steels

Abstract:

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Samples of nanostructured and ultrafine grained steels with carbon content ranging from 0.05 to 0.55%wt. have been obtained by a warm consolidation process from mechanically milled powders and subsequent heat treatments. In general, homogeneous grain size distributions were obtained except for the low-carbon steel in which a bimodal grain size distribution was observed when it was heat treated at high temperatures. The stress-strain response has been studied by means of compression tests. Nanostructured materials showed high strength but poor results in terms of ductility. In the low-ultrafine range (mean grain size between 100-500 nm) the three materials showed an increase in the ductility with strain softening. Finally, when the average grain size was close to 1 µm samples showed larger ductility and strain hardening.

Info:

Periodical:

Materials Science Forum (Volumes 584-586)

Edited by:

Yuri Estrin and Hans Jürgen Maier

Pages:

617-622

DOI:

10.4028/www.scientific.net/MSF.584-586.617

Citation:

J. A. Benito et al., "Study of the Plastic Deformation in Nanocrystalline and Ultrafine Iron and Carbon Steels", Materials Science Forum, Vols. 584-586, pp. 617-622, 2008

Online since:

June 2008

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Price:

$35.00

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