|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Advanced High-Strength Steels
||Ultrahigh Strength and Excellent Ductility Achieved by Grain Refinement in Low-carbon High-manganese Steels
||Hung-Wei Yen, Yu-Han Huang, Ching-Yuan Huang, Steve Ooi
|On-Site Speaker (Planned)
The annealed microstructure and mechanical properties of low-carbon high-manganese steels have been investigated by using transmission electron microscopy, X-ray analysis, and electron backscattered diffraction in this work. It was found that annealing at a lower temperature leads to both high tensile strength and excellent elongation in spite of its extremely small grains. The reason is that refinement of austenite grain size due to lowering annealing temperature could significantly inhibits martensite transformation during quenching to room temperature. Hence, during plastic deformation, tiny and metastable austenite transformed into ε martensite and α΄ martensite, producing high strength and excellent ductility via TRIP effects.
||Planned: Supplemental Proceedings volume