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Meeting Materials Science & Technology 2020
Symposium Ceramics and Glasses Simulations and Machine Learning
Presentation Title The Energy Landscape Governs Brittle-to-Ductile Transitions in Glasses
Author(s) Longwen Tang, Mathieu Bauchy
On-Site Speaker (Planned) Mathieu Bauchy
Abstract Scope Based on their structure, non-crystalline phases can fail in a brittle or ductile fashion. However, the nature of the linkages between structure and propensity for ductility in disordered materials has remained elusive. Here, based on molecular dynamics simulations, we investigate the fracture of a Lennard-Jones system with varying degrees of disorder. We find that that structural disorder results in an increase in ductility. By applying the activation-relaxation technique (an accelerated sampling method to identify transition states), we show that the propensity for ductility is controlled by the topography of the energy landscape.
Proceedings Inclusion? Undecided


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The Energy Landscape Governs Brittle-to-Ductile Transitions in Glasses
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