|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Advanced High-Strength Steels
||Appication of Nano-sized Precipiation in Strengthening Low Alloy Dual Phase Steel
||Tadashi Furuhara, Elango Chandiran, Naoya Kamikawa
|On-Site Speaker (Planned)
In this study, strengthening of ferrite by interphase precipitation of nano-sized vanadiun carbide (VC) was applied to ferrite-martensite dual phase (DP) steels and their effects on tensile behaviors were examined. Both the yield stress and the ultimate tensile strength are significantly increased by VC precipitation. For ferrite volume fractions of 20–50% a dispersion of VC results in only a small change in the elongation, whereas for ferrite volume fractions of above 50% both uniform and post-uniform elongations are decreased by the VC dispersion. Digital image correlation (DIC) analysis demonstrates that the ferrite phase is more deformed than the martensite phase in both VC-free and VC-dispersed DP samples, but that such strain partitioning is less pronounced in the VC dispersion-hardened samples. It is suggested that dispersion of nano-precipitates in ferrite is an effective approach to simultaneously improve the strength and the strength-ductility balance of DP steels.
||Planned: Supplemental Proceedings volume