|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Advanced High-Strength Steels
||Observation of Low Cycle Fatigue Dislocation Structures in a TWIP, TRIP and MBIB Steel, Using Electron Channelling Contrast Imaging (ECCI)
||Dayong An, Stefan Zaefferer
|On-Site Speaker (Planned)
Different high Mn steels showing the TRIP and TWIP effect as well as planar glide and kappa carbides have been submitted to a low-cycle fatigue experiment using about 0.5 % of cyclic strain. Subsequently the samples were prepared for ECCI observations and the dislocation structures in the different materials were compared for a number of different orientation. ECCI allows to observe and quantify the density and arrangement of dislocation veins and channels and to directly image the dislocations inside the veins and channels in the bulk samples. It is possible to determine the Burgers vector of the dislocations and distinguish between geometrically necessary (GND) and statistically stored (SSD) dislocations. Our observations allow to distinguish the role of the different stacking fault energies and of the presence or absence of kappa carbides.
||Planned: Supplemental Proceedings volume