期刊
SCRIPTA MATERIALIA
卷 60, 期 2, 页码 76-79出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2008.09.002
关键词
Ultrafine grain; Ferritic steels; Severe plastic deformation (SPD); Dual phases; Martensite
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 degrees 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 mu m. (C) 2008 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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