|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Bulk Metallic Glasses XIII
||Elastic Heterogeneity in Compositionally-Varied Bulk Metallic Glasses and Their Composites
||Kelly Kranjc, Peter Tsai, Emmanuelle Marquis, Wolfgang Windl, Katharine Flores
|On-Site Speaker (Planned)
Although the random atomic structure of metallic glasses is often thought to result in spatially homogeneous properties, the elastic moduli of bulk metallic glasses have been observed to vary significantly with position at the nano- and microscale, to a much greater degree than is observed in crystalline materials. These elastic heterogeneities have distinct implications for the tensile ductility and plastic deformation mechanisms in the glasses and their composites. In this work, we examine the correlation between the size and spatial distribution of the local elastic fluctuations and the bulk-scale mechanical properties of several Zr-, Ti-, and Cu-based glasses and glass-matrix composites. Nanoindentation modulus mapping reveals variations in the size and connectivity of the elastic heterogeneities with glass composition. These heterogeneities will be discussed in the context of TEM and atom probe tomographic observations of the glass structure.
||Planned: A print-only volume