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

M.A. Lebyodkin 1 T.A. Lebedkina 2 F. Chmelík 3 T.T. Lamark 4 Y. Estrin 5, 6, 7 C. Fressengeas 1 Jérôme Weiss 8
1 LPMM - Laboratoire de physique et mécanique des matériaux
2 Institute of Solid State Physics
3 Department of Physics of Materials
4 Bergen Engineering AS
5 ARC Centre of Excellence for Design in Light Metals
6 Department of Materials Engineering
7 CSIRO Division of Materials Science and Engineering
8 LGGE - Laboratoire de glaciologie et géophysique de l'environnement
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.
Keywords : acoustic emission aluminium alloys plastic flow self-assembly
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Submitted on : Tuesday, September 29, 2009 - 7:47:56 PM
Last modification on : Tuesday, September 7, 2021 - 3:54:24 PM

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M.A. Lebyodkin, T.A. Lebedkina, F. Chmelík, T.T. Lamark, Y. Estrin, et al.. Intrinsic structure of acoustic emission events during jerky flow in an Al alloy. Physical Review B: Condensed Matter and Materials Physics (1998-2015), American Physical Society, 2009, 79 (17), pp.174114. ⟨10.1103/PhysRevB.79.174114⟩. ⟨insu-00420864⟩

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