|About this Abstract
||2011 TMS Annual Meeting & Exhibition
||Bulk Metallic Glasses VIII
||Dependence of Fracture Toughness on the Configurational State of a Metallic Glass
||Glenn Garrett, Jin-Yoo Suh, Michael Floyd, Angeliki Kapoglou, Marios Demetriou, William L Johnson
|On-Site Speaker (Planned)
The fracture toughness of a metallic glass is thought to be determined by the ability of the glass to undergo extensive plastic shearing by hopping across a potential energy landscape while simultaneously resisting crack formation. Here, the fracture toughness of Zr35Ti30Cu8.25Be26.75 relaxed at different configurational states in the potential energy landscape was measured using single-edge-notch bending specimens. Key potential energy landscape variables such as the elastic constants and stored enthalpy were measured at each configurational state, and correlated to fracture toughness. The fracture toughness is found to correlate more strongly with the shear elastic constant, thereby revealing that toughness is limited predominantly by the resistance of the glass to undergo plastic shearing.