|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Bulk Metallic Glasses XV
||Correlation between Structural Heterogeneities and Serration Flow Behavior in Zr-based Metallic Glass
||LeHua Liu, ZhiYuan Liu, PeiJie Li
|On-Site Speaker (Planned)
The Zr-based metallic glasses with different degree of heterogeneities were papered under different cooling rates. The structural heterogeneities effect on serrated flow dynamics was investigated, showing there exists a transforms from a chaotic state to a self-organized critical state with increased inhomogeneity. By extracting the hidden information behind the defined elastic modulus of serration, the storage elastic energy density and viscosity of shear band from the serration event, it was found that volume fraction of liquid-like region during plastic deformation displays a tendency of increasing until fracture of MG. By comparing the energy of forming 2.4% free volume, the energy of activating relaxation in a shear hand and storage elastic energy of a serration, the variation of liquid-like region during deformation is ascribed competition between time induced creation of liquid-like region and the obliteration of liquid-like region caused by relaxation in shear region.
||Planned: Supplemental Proceedings volume