Computational Studies of the Correlation Between Local Structure and Ductibility of Metallic Glasses

Speaker: 
Aya Nawano
Seminar Date: 
Friday, December 6, 2019 - 12:30pm
Location: 
Mann Student Center - Room 107 See map
10 Hillhouse Av
New Haven, CT

Bulk metallic glasses (BMGs) are alloys with amorphous atomic structures. They possess desirable properties such as having high yield strength and elastic limit compared to crystalline alloys. However, their use as structural materials has been limited because of their brittle behavior, especially in tension. Unlike crystalline materials, the deformation mechanisms of glasses are not fully understood due to their complex response to applied stress. We perform molecular dynamics simulations to identify the atomic-scale signatures in undeformed BMGs that are able to predict their response to uniaxial tension and pure shear. We find strong correlations between several atomic-scale features in the undeformed sample and the mechanical response at finite strain.

Host: 
Corey O'Hern