|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Bulk Metallic Glasses XV
||Strengthening and Toughening via Phase Separation and Beta Relaxation in Zr-based Bulk Metallic Glasses
||Xidong Hui, Tuo Wang, Yanhui Liu
|On-Site Speaker (Planned)
Bulk metallic glasses (BMGs) are known to have extraordinary merits such as ultrahigh strength and dynamic toughness etc. but tied to the detrimental brittleness, which has become a critical issue to the engineering application and understanding the glass nature. In this work, we report a new class of Zr-based BMGs, including Zr-Al-Ni-Cu, Zr-Al-Ni-Cu-Nb, Zr-Cu-Al-Nb, Zr-Cu-Fe-Nb, Zr-Cu-Al-Mo BMGs with extraordinary plastic strain. “Work-hardening” effect after yielding in a wide range of plastic deformation process has been detected for some of these of BMGs. Compositional heterogeneity was differentiated in this kind of BMGs. Pronounced humps have been observed on the high frequency kinetic spectrum in some of these BMGs, which is the indicator of β-relaxation transition. The underlying mechanism for the excellent plastic deforming ability of this class of BMGs is ascribed to the synergistic effects of soft glass zone formed through phase separation and abundant flow units which related to β-relaxation.
||Planned: Supplemental Proceedings volume