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

Josep Antonio Benito; Robert Tejedor; Rodriguez Rodríguez-Baracaldo; Jose María Cabrera; Jose Manuel Prado

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

Paper Titles

Microstructure Development and Precipitation Effects in Ultra Fine Grained Mg-3Tb-2Nd Alloy Prepared by High Pressure Torsion
p.591

Tensile Property of Submicrocrystalline Pure Fe Produced by HPT-Straining
p.597

Effect of Grain Refinement on the Mechanical Behaviour of Ferritic Steels: Evolution of Isotropic Hardening and Kinematic Hardening
p.605

Evolution of Texture in Ultra-Fine Grained Ferrite through Warm-Rolling and Intercritical Annealing
p.610

Study of the Plastic Deformation in Nanocrystalline and Ultrafine Iron and Carbon Steels
p.617

Ultrafine Grained Low Carbon Steels Processed by Severe Plastic Deformation
p.623

Microstructure Evolution during Continuous Frictional Angular Extrusion of Interstitial-Free Steel
p.631

Fracture Toughness Enhanced by Severe Plastic Deformation in Low Carbon Steel
p.637

Regularities of Deformation and Fracture of Steels Subjected to Equal Channel Angular Pressing and Thermal Processing
p.643

HomeMaterials Science ForumMaterials Science Forum Vols. 584-586Study of the Plastic Deformation in...

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

Abstract:

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.