|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Nanocomposites V: Structure-Property Relationships in Nanostructured Materials
||Anisotropy of a High Strength Nanolayered Steel Revealed by In-situ Micro Mechanical Testing
||Marlene Kapp, Anton Hohenwarter, Bo Yang, Reinhard Pippan
|On-Site Speaker (Planned)
Applying severe plastic deformation to a pearlitic steel yields in the formation of a nanocomposite with a microhardness of 740 HV. In-situ micro compression experiments performed on three different pillar types revealed a dependency of the achievable strength on the loading direction of the ferrite and cementite lamellae. Correlation with the in-situ captured deformation characteristics revealed strain localizations initiating at different stress levels for parallel, normal and inclined loading of the lamellae. The evolving shear and kink bands shut off strain hardening and eventually lead to catastrophic failure of the samples. However, the susceptibility of these fine scaled composites to strain localizations can be overcome by a change in the load path from compression to bending. The effect of this promising findings will be demonstrated by in-situ cyclic micro bending experiments, where a stress range of 6 GPa can be achieved.
||Planned: Supplemental Proceedings volume