Crossover from Localized to Cascade Relaxations in Metallic Glasses

Yue Fan, Takuya Iwashita, and Takeshi Egami
Phys. Rev. Lett. 115, 045501 – Published 21 July 2015
PDFHTMLExport Citation

Abstract

Thermally activated deformation is investigated in two metallic glass systems with different cooling histories. By probing the atomic displacements and stress changes on the potential energy landscape, two deformation modes, a localized process and cascade process, have observed. The localized deformation involves fewer than 30 atoms and appears in both systems, and its size is invariant with cooling history. However, the cascade deformation is more frequently observed in the fast quenched system than in the slowly quenched system. The origin of the cascade process in the fast quenched system is attributed to the higher density of local minima on the underlying potential energy landscape.

  • Figure
  • Figure
  • Figure
  • Figure
  • Received 10 February 2015

DOI:https://doi.org/10.1103/PhysRevLett.115.045501

© 2015 American Physical Society

Authors & Affiliations

Yue Fan1,*, Takuya Iwashita2, and Takeshi Egami1,2,3

  • 1Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
  • 2Department of Physics and Astronomy, Joint Institute for Neutron Sciences, University of Tennessee, Knoxville, Tennessee 37996, USA
  • 3Department of Materials Science and Engineering, University of Tennessee, Knoxville, Tennessee 37996, USA

  • *Corresponding author. fany@ornl.gov

Article Text (Subscription Required)

Click to Expand

Supplemental Material (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 115, Iss. 4 — 24 July 2015

Reuse & Permissions
Access Options
CHORUS

Article Available via CHORUS

Download Accepted Manuscript
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review Letters

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×