Study of the Plastic Deformation in Nanocrystalline and Ultrafine Iron and Carbon Steels
| Autor: | José-María Cabrera, Robert Tejedor, José Manuel Prado, R. Rodríguez-Baracaldo, J. A. Benito |
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| Rok vydání: | 2008 |
| Předmět: |
Materials science
Mechanical Engineering Metallurgy food and beverages chemistry.chemical_element Strain hardening exponent Condensed Matter Physics Grain size Nanocrystalline material chemistry Mechanics of Materials Ferrite (iron) Particle-size distribution General Materials Science Ductility Softening Carbon |
| Zdroj: | Materials Science Forum. :617-622 |
| ISSN: | 1662-9752 |
| DOI: | 10.4028/www.scientific.net/msf.584-586.617 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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