Anelastic to Plastic Transition in Metallic Glass-Forming Liquids

John S. Harmon, Marios D. Demetriou, William L. Johnson, and Konrad Samwer
Phys. Rev. Lett. 99, 135502 – Published 28 September 2007

Abstract

The configurational properties associated with the transition from anelasticity to plasticity in a transiently deforming metallic glass-forming liquid are studied. The data reveal that the underlying transition kinetics for flow can be separated into reversible and irreversible configurational hopping across the liquid energy landscape, identified with β and α relaxation processes, respectively. A critical stress characterizing the transition is recognized as an effective Eshelby “backstress,” revealing a link between the apparent anelasticity and the “confinement stress” of the elastic matrix surrounding the plastic core of a shear transformation zone.

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  • Received 8 June 2007

DOI:https://doi.org/10.1103/PhysRevLett.99.135502

©2007 American Physical Society

Authors & Affiliations

John S. Harmon1, Marios D. Demetriou1,*, William L. Johnson1, and Konrad Samwer2

  • 1Keck Engineering Laboratories, California Institute of Technology, Pasadena, California 91125, USA
  • 2I. Physik Institute, University of Goettingen, Goettingen, Germany

  • *To whom all correspondence should be addressed. marios@caltech.edu

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Issue

Vol. 99, Iss. 13 — 28 September 2007

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