The pulsed eddy current response to applied loading of various aluminium alloys

Maxim Morozov; Gui Yun Tian; Philip J. Withers

doi:10.1016/j.ndteint.2010.05.004

The pulsed eddy current response to applied loading of various aluminium alloys

Maxim Morozov, Gui Yun Tian, Philip J. Withers

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

Abstract

In this paper the pulsed eddy current (PEC) response of a range of heat treatable and non-heat treatable aluminium alloys (AA-1050, 2024, 5083 and 7075) to applied stress well below the elastic limit is studied. The effect of prior heat treatment and prior plastic deformation on the stress dependency of the pulsed eddy current response is quantified using the peak value of the PEC difference signal. In certain cases non-linear stress responses are measured. Because it is well known that the effect of stress on conductivity is anisotropic both isotropic (circular) probes and directional (rectangular) probes are compared. It is found that both prior plastic work and heat treatment condition can have a strong effect on the stress coefficients, even changing the sign of the stress dependence. The implications of these effects for the future characterisation of residual stress state by PEC are discussed. © 2010 Elsevier Ltd. All rights reserved.

Original language	English
Pages (from-to)	493-500
Number of pages	7
Journal	NDT and E International
Volume	43
Issue number	6
DOIs	https://doi.org/10.1016/j.ndteint.2010.05.004
Publication status	Published - Sept 2010

Keywords

Aging
Electrical conductivity
Plastic deformation
Pulsed eddy currents
Residual stress

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10.1016/j.ndteint.2010.05.004

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title = "The pulsed eddy current response to applied loading of various aluminium alloys",

abstract = "In this paper the pulsed eddy current (PEC) response of a range of heat treatable and non-heat treatable aluminium alloys (AA-1050, 2024, 5083 and 7075) to applied stress well below the elastic limit is studied. The effect of prior heat treatment and prior plastic deformation on the stress dependency of the pulsed eddy current response is quantified using the peak value of the PEC difference signal. In certain cases non-linear stress responses are measured. Because it is well known that the effect of stress on conductivity is anisotropic both isotropic (circular) probes and directional (rectangular) probes are compared. It is found that both prior plastic work and heat treatment condition can have a strong effect on the stress coefficients, even changing the sign of the stress dependence. The implications of these effects for the future characterisation of residual stress state by PEC are discussed. {\textcopyright} 2010 Elsevier Ltd. All rights reserved.",

keywords = "Aging, Electrical conductivity, Plastic deformation, Pulsed eddy currents, Residual stress",

author = "Maxim Morozov and {Yun Tian}, Gui and Withers, {Philip J.}",

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T1 - The pulsed eddy current response to applied loading of various aluminium alloys

AU - Morozov, Maxim

AU - Yun Tian, Gui

AU - Withers, Philip J.

N1 - Times Cited: 0

PY - 2010/9

Y1 - 2010/9

N2 - In this paper the pulsed eddy current (PEC) response of a range of heat treatable and non-heat treatable aluminium alloys (AA-1050, 2024, 5083 and 7075) to applied stress well below the elastic limit is studied. The effect of prior heat treatment and prior plastic deformation on the stress dependency of the pulsed eddy current response is quantified using the peak value of the PEC difference signal. In certain cases non-linear stress responses are measured. Because it is well known that the effect of stress on conductivity is anisotropic both isotropic (circular) probes and directional (rectangular) probes are compared. It is found that both prior plastic work and heat treatment condition can have a strong effect on the stress coefficients, even changing the sign of the stress dependence. The implications of these effects for the future characterisation of residual stress state by PEC are discussed. © 2010 Elsevier Ltd. All rights reserved.

AB - In this paper the pulsed eddy current (PEC) response of a range of heat treatable and non-heat treatable aluminium alloys (AA-1050, 2024, 5083 and 7075) to applied stress well below the elastic limit is studied. The effect of prior heat treatment and prior plastic deformation on the stress dependency of the pulsed eddy current response is quantified using the peak value of the PEC difference signal. In certain cases non-linear stress responses are measured. Because it is well known that the effect of stress on conductivity is anisotropic both isotropic (circular) probes and directional (rectangular) probes are compared. It is found that both prior plastic work and heat treatment condition can have a strong effect on the stress coefficients, even changing the sign of the stress dependence. The implications of these effects for the future characterisation of residual stress state by PEC are discussed. © 2010 Elsevier Ltd. All rights reserved.

KW - Aging

KW - Electrical conductivity

KW - Plastic deformation

KW - Pulsed eddy currents

KW - Residual stress

U2 - 10.1016/j.ndteint.2010.05.004

DO - 10.1016/j.ndteint.2010.05.004

M3 - Article

SN - 0963-8695

VL - 43

SP - 493

EP - 500

JO - NDT and E International

JF - NDT and E International

IS - 6

ER -

The pulsed eddy current response to applied loading of various aluminium alloys

Abstract

Keywords

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