A new route to fabricate ultrafine-grained structures in carbon steels without severe plastic deformation

A new route to fabricate ultrafine-grained structures in carbon steels without severe plastic deformation

A new route to fabricate ultrafine-grained ferritic steel without severe plastic deformation is described. A low-carbon steel sheet with a duplex microstructure composed of ferrite and martensite was cold-rolled to 91% reduction in thickness, and then annealed at 620–655 °C. The microstructure obtai...

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Veröffentlicht in:Scripta materialia 2009, Vol.60 (2), p.76-79
Hauptverfasser: Okitsu, Yoshitaka, Takata, Naoki, Tsuji, Nobuhiro
Format: Artikel
Sprache:eng
Schlagworte:
Annealing
Cold rolling
Dual phases
Ferrite
Ferritic steels
Grain size
Martensite
Microstructure
Plastic deformation
Severe plastic deformation (SPD)
Sheet metal
Structural steels
Ultrafine grain
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Beschreibung
Zusammenfassung:A new route to fabricate ultrafine-grained ferritic steel without severe plastic deformation is described. A low-carbon steel sheet with a duplex microstructure composed of ferrite and martensite was cold-rolled to 91% reduction in thickness, and then annealed at 620–655 °C. The microstructure obtained via this process was fully annealed ultrafine grains of ferrite including homogenously dispersed cementite particles. The mean ferrite grain sizes obtained were 0.49–0.85 μm.
ISSN:1359-6462
1872-8456
DOI:10.1016/j.scriptamat.2008.09.002