|About this Abstract
|2022 TMS Annual Meeting & Exhibition
|Advanced Characterization Techniques for Quantifying and Modeling Deformation
|Grain Environment Dependent Deformation Twinning in a TWIP Steel: A 3DXRD Study
|James Ball, Stefan Michalik, Oxana Magdysyuk, Thomas Connolley, David Collins
|On-Site Speaker (Planned)
Three-dimensional X-Ray diffraction (3DXRD) was employed to provide micromechanical insights from a coarse grain, high-Mn TWIP steel derivative during in-situ deformation. This work showcases a new capability to perform synchrotron-based Far Field 3DXRD experiments at the I12 Beamline, Diamond Light Source, as well as the suitability for quantifying grain specific crystallography, stress state, position and neighbouring crystal environmental detail. This was utilised to deduce the behaviour of individual austenite grains during loading; it was possible to depict grain specific conditions that triggered twinning events. This included new observations of sudden crystal rotations at the inception of a twin, thought to be a necessary condition for the grain to accommodate local displacive changes. Along with independent verification of the diffraction observations via offline electron microscopy methods, this work contributes to the fundamental understanding of ultra-high ductility steels with transformation induced mechanism behaviour.
|Phase Transformations, Characterization, Iron and Steel