|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Advanced High-strength Steels
||Deformation Mechanism of Dual Phase Steels Composed of Ferrite and Martensite
||Nobuhiro Tsuji, Myeong-heom Park, Daisuke Terada, Yu Bai, Akinobu Shibata
|On-Site Speaker (Planned)
Dual phase (DP) steels in which the microstructures are composed of a soft ferrite phase and a hard martensite phase are known to show good strain-hardening, high strength and large elongation, but mechanisms for their superior mechanical properties are still unclear. In the present study, DP structures, having different morphologies in distribution of martensite and different grain sizes were fabricated in a low-carbon steel by different heat treatment routes, and their tensile deformation behavior was analyzed using the digital image correlation (DIC) technique. It was revealed that the DP specimens having networked martensite microstructures showed a better strength-ductility balance than the DP specimens with isolated martensite structures. The DP specimen having finer ferrite grain size also showed both higher strength and larger ductility than that with coarser grain size.
||Planned: Supplemental Proceedings volume