Strain-rate fluctuations during macroscopically uniform deformation of a solution-strengthened alloy

Rebecca N. Mudrock; Mikhail A. Lebyodkin; Peter Kurath; Armand J. Beaudoin; Tatiana A. Lebedkina

doi:10.1016/j.scriptamat.2011.09.025

Strain-rate fluctuations during macroscopically uniform deformation of a solution-strengthened alloy

Rebecca N. Mudrock, Mikhail A. Lebyodkin, Peter Kurath, Armand J. Beaudoin, Tatiana A. Lebedkina

Mechanical Science and Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

Using a work-hardened aluminum alloy that exhibits dynamic strain aging, oscillations in strain rate transitioning into intermittent local plastic activity are observed through an extended elastoplastic transition, before onset of the Portevin-Le Chatelier effect. Fourier analysis confirms this intermittency spans multiple scales. Wavelet analysis provides a method of quantifying transitions in the deformation behavior in both the time and frequency domains, and reveals a period doubling transition in both the local strain rate and global load signals.

Original language	English (US)
Pages (from-to)	1093-1096
Number of pages	4
Journal	Scripta Materialia
Volume	65
Issue number	12
DOIs	https://doi.org/10.1016/j.scriptamat.2011.09.025
State	Published - Dec 2011

Keywords

Aluminum alloys
Dynamic phenomena
Dynamic strain aging
Image analysis
Plasticity

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys

Online availability

10.1016/j.scriptamat.2011.09.025

Library availability

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title = "Strain-rate fluctuations during macroscopically uniform deformation of a solution-strengthened alloy",

abstract = "Using a work-hardened aluminum alloy that exhibits dynamic strain aging, oscillations in strain rate transitioning into intermittent local plastic activity are observed through an extended elastoplastic transition, before onset of the Portevin-Le Chatelier effect. Fourier analysis confirms this intermittency spans multiple scales. Wavelet analysis provides a method of quantifying transitions in the deformation behavior in both the time and frequency domains, and reveals a period doubling transition in both the local strain rate and global load signals.",

keywords = "Aluminum alloys, Dynamic phenomena, Dynamic strain aging, Image analysis, Plasticity",

author = "Mudrock, {Rebecca N.} and Lebyodkin, {Mikhail A.} and Peter Kurath and Beaudoin, {Armand J.} and Lebedkina, {Tatiana A.}",

note = "Funding Information: We are indebted to conversations with Profs. J. Cartwright, O. Piro and C. Fressengeas. The authors would like to acknowledge financial support through CNRS (France) and the US Department of Energy grant no. DE-F636-05G015049. We want to acknowledge Dr. Mauro Sardela for his help with texture analysis, which was carried out in part in the Frederick Seitz Materials Research Laboratory Central Facilities, University of Illinois, which is partially supported by the US Department of Energy under grants DE-FG02-07ER46453 and DE-FG02-07ER46471. ",

year = "2011",

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language = "English (US)",

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journal = "Scripta Materialia",

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AU - Mudrock, Rebecca N.

AU - Lebyodkin, Mikhail A.

AU - Kurath, Peter

AU - Beaudoin, Armand J.

AU - Lebedkina, Tatiana A.

N1 - Funding Information: We are indebted to conversations with Profs. J. Cartwright, O. Piro and C. Fressengeas. The authors would like to acknowledge financial support through CNRS (France) and the US Department of Energy grant no. DE-F636-05G015049. We want to acknowledge Dr. Mauro Sardela for his help with texture analysis, which was carried out in part in the Frederick Seitz Materials Research Laboratory Central Facilities, University of Illinois, which is partially supported by the US Department of Energy under grants DE-FG02-07ER46453 and DE-FG02-07ER46471.

PY - 2011/12

Y1 - 2011/12

N2 - Using a work-hardened aluminum alloy that exhibits dynamic strain aging, oscillations in strain rate transitioning into intermittent local plastic activity are observed through an extended elastoplastic transition, before onset of the Portevin-Le Chatelier effect. Fourier analysis confirms this intermittency spans multiple scales. Wavelet analysis provides a method of quantifying transitions in the deformation behavior in both the time and frequency domains, and reveals a period doubling transition in both the local strain rate and global load signals.

AB - Using a work-hardened aluminum alloy that exhibits dynamic strain aging, oscillations in strain rate transitioning into intermittent local plastic activity are observed through an extended elastoplastic transition, before onset of the Portevin-Le Chatelier effect. Fourier analysis confirms this intermittency spans multiple scales. Wavelet analysis provides a method of quantifying transitions in the deformation behavior in both the time and frequency domains, and reveals a period doubling transition in both the local strain rate and global load signals.

KW - Aluminum alloys

KW - Dynamic phenomena

KW - Dynamic strain aging

KW - Image analysis

KW - Plasticity

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SP - 1093

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JO - Scripta Materialia

JF - Scripta Materialia

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ER -

Strain-rate fluctuations during macroscopically uniform deformation of a solution-strengthened alloy

Abstract

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ASJC Scopus subject areas

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