Intrinsic structure of acoustic emission events during jerky flow in an Al alloy

M. A. Lebyodkin, T. A. Lebedkina, F. Chmelík, T. T. Lamark, Y. Estrin, C. Fressengeas, and J. Weiss
Phys. Rev. B 79, 174114 – Published 22 May 2009

Abstract

Scaling behavior is found in acoustic-emission events associated with stress drops observed in velocity-driven plastic deformation of an Al alloy, which exhibits jerky plastic flow. The occurrence of scaling proves that these acoustic-emission events, which are commonly regarded as “elementary” ones, have a small-scale self-organized structure comprising a group of peaks correlated in time. This structure reveals details of the temporal variation in elementary plastic events at a microsecond scale, which are hardly accessible by other measurement techniques.

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  • Received 18 February 2009

DOI:https://doi.org/10.1103/PhysRevB.79.174114

©2009 American Physical Society

Authors & Affiliations

M. A. Lebyodkin1,*, T. A. Lebedkina2, F. Chmelík3, T. T. Lamark4, Y. Estrin5,6, C. Fressengeas1, and J. Weiss7

  • 1Laboratoire de Physique et Mécanique des Matériaux, Université Paul Verlaine-Metz/CNRS, Ile du Saulcy, 57045 Metz, France
  • 2Institute of Solid State Physics, Russian Academy of Sciences, 142432 Chernogolovka, Russia
  • 3Department of Physics of Materials, Charles University, Ke Karlovu 5, CZ-121 16 Prague 2, Czech Republic
  • 4Bergen Engineering AS, N-5862 Bergen, Norway
  • 5ARC Centre of Excellence for Design in Light Metals, Clayton, Victoria 3217, Australia and Department of Materials Engineering, Monash University, Clayton, Victoria 3800, Australia
  • 6CSIRO Division of Materials Science and Engineering, Clayton South, Victoria 3169, Australia
  • 7Laboratoire de Glaciologie et Géophysique de l’Environnement/CNRS, 54 rue Molière, Boîte Postale 96, 38402 St. Martin d’Hères, France

  • *Corresponding author. lebedkin@univ-metz.fr

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Issue

Vol. 79, Iss. 17 — 1 May 2009

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