|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Mechanical Behavior at the Nanoscale III
||Anisotropy in Nanolamellar Pearlitic Steels Investigated at the Micron Scale
||Marlene Kapp, Anton Hohenwarter, Stefan Wurster, Bo Yang, Reinhard Pippan
|On-Site Speaker (Planned)
A pearlitic steel was subjected to high pressure torsion (HPT), which enabled a nanolamellar (nl) high strength composite of 3.7 GPa strength by reducing the ferrite and cementite lamellae thickness to the nanoscale. The deformation procedure further caused a realignment of the lamellae into the shearing direction of the HPT disk, giving rise to an anisotropic mechanical response. With micro-compression tests, the anisotropic flow stress could be successfully measured for the first time. Therefore, different types of pillars were focused ion beam milled with the ferrite and cementite lamellae being aligned parallel, normal and inclined with respect to the loading direction. The experiments were conducted in situ inside a scanning electron microscope, which allowed to link the mechanical data to the deformation characteristics. Further investigation of the pillar cross sections shed light onto the anisotropic deformation and failure mechanisms at large compressive strains.
||Planned: A print-only volume