|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Advanced High-strength Steels
||Strengthening Mechanism of a Medium Mn Steel with a Yield Strength of 2.2 GPa and Uniform Elongation of 16%
||M.X. Huang, Binbin He
|On-Site Speaker (Planned)
Strength and ductility in steels are mutually exclusive. By harnessing the synergy between multiple strengthening and plasticity mechanisms, we develop a breakthrough steel with a yield strength of 2.2 GPa and an extraordinary large tensile uniform elongation of 16% using a simple and economic alloying design. The present novel steel possesses a dual-phase hierarchical nanostructure consisting of nanosized precipitates, nanotwins, and lamellar nano- and ultrafine-grained austenite and ferrite. Dislocation strengthening contributes 1.6 GPa of the yield strength while the other strengthening mechanisms including solid-solution, precipitation, dislocations, grain boundary contribute 0.6 GPa.
||Planned: Supplemental Proceedings volume