|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Characterization of Minerals, Metals, and Materials
||LL-23: Characterization of Boron in Boron Containing Steels
||Kara Luitjohan, Volkan Ortalan, David Johnson
|On-Site Speaker (Planned)
Advanced high strength steels, such as boron containing steels, allow the automotive industry to use thinner gauge components without sacrificing safety. Due to boron segregation, continuously cast steels form defects from low temperature remelting. While the microstructural origins of the defects have been characterized, little is known about the structure of the boron-rich phases, and the composition of those phases have only been inferred from predicted phase diagrams. In this study, we investigate the microstructure of the boron-rich phases and the compositional distribution of boron at the interfaces, such as austenitic grain boundaries and Fe-boride interfaces, in cast steels utilizing aberration-corrected scanning transmission electron microscopy and electron energy loss (EEL) spectroscopy. By collecting EEL spectrum images, we are able to determine the distribution of boron over a specific region of the microstructure, and the specific structure of the boron rich regions are identified by the unique EEL near-edge fine structure.
||Planned: A print-only volume