|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Bulk Metallic Glasses XV
||Aging Dynamics around a Shear Band in a Metallic Glass
||Robert Maass, Stefan Kuechemann, Chaoyang Liu, Eric M Dufresne, Jeremy Shin
|On-Site Speaker (Planned)
Strain localization into shear bands in metallic glasses (MGs) has long sought to be a phenomenon confined to the nano-scale, but recent work highlights that shear bands induce a position-dependent long-range signature (Acta Materialia 98 (2015) 94). Here we use x-ray photon correlation spectroscopy to unravel the structural dynamics around a shear band. We show that damage accumulation into a shear band leads to significantly accelerated relaxation dynamics at length scales three orders of magnitude larger than the core of the shear band. The ten-times-faster dynamics in the shear-band vicinity compared to the as-cast matrix occurs in a characteristic three-stage aging regime. These insights highlight how an ubiquitous nano-scale strain-localization mechanism in MGs leads to fundamental changes of the material at the mesoscale.
||Planned: Supplemental Proceedings volume