Bulk Metallic Glasses Deform via Slip Avalanches

Authors

James Antonaglia
Wendelin Wright, Bucknell UniversityFollow
Xiaojun Gu, Bucknell UniversityFollow
Rachel R. Byer, Bucknell UniversityFollow
Todd C. HufnagelFollow
Michael LeBlancFollow
Jonathan T. Uhl
Karin A. DahmenFollow

Publication Date

2014

Description

For the first time in metallic glasses, we extract both the exponents and scaling functions that describe the nature, statistics, and dynamics of slip events during slow deformation, according to a simple mean field model. We model the slips as avalanches of rearrangements of atoms in coupled shear transformation zones (STZs). Using high temporal resolution measurements, we find the predicted, different statistics and dynamics for small and large slips thereby excluding self-organized criticality. The agreement between model and data across numerous independent measures provides evidence for slip avalanches of STZs as the elementary mechanism of inhomogeneous deformation in metallic glasses.

Journal

Physical Review Letters

Volume

112

Issue

15

First Page

5501

Last Page

5501

Department

Chemical Engineering

Link to Published Version

http://arxiv.org/ftp/arxiv/papers/1312/1312.6179.pdf

Recommended Citation

Antonaglia, James; Wright, Wendelin; Gu, Xiaojun; Byer, Rachel R.; Hufnagel, Todd C.; LeBlanc, Michael; Uhl, Jonathan T.; and Dahmen, Karin A.. "Bulk Metallic Glasses Deform via Slip Avalanches." Physical Review Letters (2014) : 5501-5501.