|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Bulk Metallic Glasses XIX
||Long-time Structural Evolution of a Metallic Glass at Elevated Temperature Measured by XPCS
||Birte Riechers, Amlan Das, Eric Dufresne, Robert Maass
|On-Site Speaker (Planned)
With the establishment of X-ray photon correlation spectroscopy (XPCS), the in-situ exploration of the structural evolution of metallic glasses became accessible. While the technique serves as a powerful experimental tool for identifying the momentary relaxation response of the amorphous structure in physical aging experiments, it also allows for tracking crystalline contributions over time.
Here, we explore the structural evolution of a Zr-based bulk metallic glass under annealing at a temperature very close to its glass transition region over a time frame of more than three days by XPCS. By choosing an appropriate scattering vector the evolution of both the crystalline and amorphous contributions is tracked throughout the experiment. While the momentary time scale of structural relaxation reflects the hallmarks of physical aging, the contrast capturing short time-scale dynamics exhibits unexpected fluctuations along the isotherm. We discuss the evolution of these data in terms of their connection to the crystallization process.