|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Bulk Metallic Glasses XIII
||Evolution of Atomic Distribution during Devitrification of Bulk Metallic Glasses
||Sanghita Mridha, Sundeep Mukherjee
|On-Site Speaker (Planned)
Understanding how the atomic structure in metallic glasses evolves during relaxation and devitrification is critical in tailoring its properties. In this study, evolution of atomic structure and destabilization pathways were studied for several metallic glasses by atom probe (LEAP) and transmission electron microscopy (TEM). Atom probe is an advanced characterization technique which allows mapping of the atomic structure in materials with sub-nanometer resolution. Devitrification in Zr-based “strong” glasses was found to proceed via the formation of Ti-rich/Be-depleted icsosahedral clusters. In contrast, noble-metal based “fragile” glasses demonstrated eutectic crystallization without any intermediate phase formation. There was no evidence of phase separation in the starting fully amorphous as-cast bulk metallic glasses as reported in previous studies.
||Planned: A print-only volume