Work

Tension-compression asymmetry of shear band stability in bulk metallic glasses

Year: 2025

Type: article

Abstract: Shear band stability is measured for a Zr-based bulk metallic glass in compressive bending and compared with previous results in tension. Compressive failure is induced via bending of trapezoidal cross-section beams. This characterization is done at multiple fictive temperatures and compared with results in tension, revealing a compression-tension asymmetry in shear banding stability. Stability, indicated here as the ability to resist catastrophic shear bands in favor of stable, arrested shear bands, is higher in compression than tension at all measured fictive temperatures. This asymmetry suggests that shear band propagation is different in tension and compression, and possible mechanisms underlying this difference are suggested. Additionally, this stability measurement is shown to be consistent in uniaxial compression testing, demonstrating its potential for predicting a brittle vs. ductile response in different loading modes of bulk metallic glasses.

Source: Materialia

DOI: 10.1016/j.mtla.2025.102408

Authors: Ethen Thomas Lund, Sungwoo Sohn, Axel van de Walle, Stefano Curtarolo, Douglas Hofmann, Jan Schroers

Institutions: Yale University, Brown University, Duke University, California Institute of Technology

Language: English

Topic: Metallic Glasses and Amorphous Alloys

Subfield: Mechanical Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $2,400

Funders: National Science Foundation, Office of Naval Research, Office of Naval Research Global, National Science Foundation Graduate Research Fellowship Program