|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Pan American Materials Congress: Nanocrystalline and Ultra-fine Grain Materials and Bulk Metallic Glasses
||Static and Cyclic Mechanical Properties of High Strength Pearlitic Steels
||Marlene Kapp, Anton Hohenwarter, Bo Yang, Reinhard Pippan
|On-Site Speaker (Planned)
High pressure torsion was applied to a pearlitic steel, generating a high strength composite by refining the ferrite and cementite lamellae spacing to the nanoscale. Static mechanical properties have been studied by in-situ micro compression experiments inside a scanning electron microscope, which allows for an instructive correlation to the deformation and failure behavior. A compressive strength of 3.7 GPa was achieved for the nanocomposite, which could be explained by a distinct increase of the yield strength and strain hardening capacity compared to the initial material. Different types of strain localization were observed depending on the loading direction of the lamellae, ceasing the remarkable strain hardening capacity inherent to nanocomposites. The high static strength suggests an outstanding performance under cyclic loading conditions. Therefore, first results of cyclic micro bending experiments will be presented capable of shedding light onto the prevailing fatigue and damage mechanisms in these ultrastrong material.
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