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

被引：34

作者：

Lebyodkin, M. A. ^{[1
]}

Lebedkina, T. A. ^{[2
]}

Chmelik, F. ^{[3
]}

Lamark, T. T. ^{[4
]}

Estrin, Y. ^{[5
,6
,7
]}

Fressengeas, C. ^{[1
]}

Weiss, J. ^{[8
]}

机构：

[1] Univ Paul Verlaine Metz, CNRS, Lab Phys & Mecan Mat, F-57405 Metz, France

[2] Russian Acad Sci, Inst Solid State Phys, Chernogolovka 142432, Russia

[3] Charles Univ Prague, Dept Phys Mat, CZ-12116 Prague 2, Czech Republic

[4] Bergen Engn AS, N-5862 Bergen, Norway

[5] ARC Ctr Excellence Design Light Met, Clayton, Vic 3217, Australia

[6] Monash Univ, Dept Mat Engn, Clayton, Vic 3800, Australia

[7] CSIRO, Div Mat Sci & Engn, Clayton, Vic 3169, Australia

[8] CNRS, Lab Glaciol & Geophys Environm, F-38402 St Martin Dheres, France

来源：

PHYSICAL REVIEW B | 2009年 / 79卷 / 17期

关键词：

acoustic emission; aluminium alloys; plastic flow; self-assembly; PLASTIC-FLOW; SINGLE-CRYSTALS; DEFORMATION; METALS; STATISTICS;

D O I：

10.1103/PhysRevB.79.174114

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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.

引用

页数：6

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