Work

Experimental characterization of shear transformation zones for plastic flow of bulk metallic glasses

Year: 2008

Type: article

Abstract: We report experimental characterization of shear transformation zones (STZs) for plastic flow of bulk metallic glasses (BMGs) based on a newly developed cooperative shearing model [Johnson WL, Samwer K (2005) A universal criterion for plastic yielding of metallic glasses with a (T/T(g))(2/3) temperature dependence. Phys Rev Lett 95: 195501]. The good agreement between experimental measurements and theoretical predictions in the STZ volumes provides compelling evidence that the plastic flow of metallic glasses occurs through cooperative shearing of unstable STZs activated by shear stresses. Moreover, the ductility of BMGs was found to intrinsically correlate with their STZ volumes. The experiments presented herein pave a way to gain a quantitative insight into the atomic-scale mechanisms of BMG mechanical behavior.

Source: Proceedings of the National Academy of Sciences

DOI: 10.1073/pnas.0806051105

Authors: D. Pan, A. Inoue, T. Sakurai, M. W. Chen

Institutions: Tohoku University, Institute for Materials Research, Tohoku University

Language: English

Topic: Metallic Glasses and Amorphous Alloys

Subfield: Mechanical Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: bronze

Funders: Japan Society for the Promotion of Science, Division of Materials Research

OpenAlex ID: W2132920809