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고영건(Y. G. Ko),이강민(K. M. Lee),이철원(C. W. Lee),금동훈(D. H. Kum),신동혁(D. H. Shin) 한국소성가공학회 2009 한국소성가공학회 학술대회 논문집 Vol.2009 No.10
The present work deals with microstructure and tensile deformation of nanostructured dual-phase steel consisting of ferrite and martensite phases. Prior to deformation, a fully martensite phase is prepared and then processed by equal channel angular pressing (ECAP) and subsequent annealing. Room-temperature tensile properties are examined and compared to those of dual-phase steels with coarse grains. Due to the combined effects coming from the grain refinement of both phases and their uniform distributions, the nanostructured dual-phase steel exhibits better strength and ductility than coarse grained counterpart, achieving ~1 GPa and ~20% for tensile strength and elongation, respectively.