|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Bulk Metallic Glasses XIII
||Heterogeneity and Structural Relaxation during Elastic Deformation in Zr-based BMG
||Wojciech Dmowski, Yang Tong, Yoshihiko Yokoyama, Takeshi Egami
|On-Site Speaker (Planned)
Apparent stress-strain relationship in bulk metallic glasses is linear up to the elastic limit. It suggests simple linear Hook behavior in the elastic regime. However, in situ X-ray diffraction studies during elastic deformation indicated that there was a significant structural contribution due to local structural anelastic-like relaxation. The high energy X-ray diffraction studies were carried out using synchrotron radiation and local atomic strains were obtained using the anisotropic pair distribution function method. The measurements probed structural response during elastic deformation in tension and compression at elevated temperatures up to the glass transition. We found that size of the non-affine deformation is more localized within elastic regime then in typical time dependent “creep” regime. The observed behavior is explained in terms of potential energy landscape and different modes of relaxation.
Supported by the US Department of Energy, Office of Sciences, Basic Energy Sciences, Materials Science and Engineering Division.
||Planned: A print-only volume