|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Mechanical Behavior of Nanostructured Materials
||L-125: Competition between Slip and Martensitic Transformation of Retained Austenite in Carbon-steel/Copper Nanolaminates
||Yadong Ru, Yang Ren, Lishan Cui, Kaiyuan Yu
|On-Site Speaker (Planned)
The ductility of steels with TRIP effects relies on the coupling between slip and transformation of retained austenite. Understanding the coupling mechanism is of great significance for the ductility enhancement of nanostructured steels. In this study, nanolamellar high-carbon-steel/copper composites are fabricated by hot pressing, rolling and wire drawing. Copper suppresses the growth of prior austenite (average size ~100nm) at elevated temperatures, and subsequent quenching and partitioning treatments result in a large amount of nanosized retained austenite phases, which in return enhance the plasticity of the materials to a maximum elongation of 60%. In situ tensile tests under synchrotron X-ray reveal that the transformation rate of retained austenite is much higher during the stress-induced regime than the strain-induced regime and the deformation mechanism of the composites is a result of the competition between transformation and slip of the retained austenite phases.
||Planned: Supplemental Proceedings volume