Application of Eddy Currents in Processed Materials Structural Evaluation

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Eddy currents are based on electromagnetic induction and analysis of electrical currents on conductive materials. This method is used for thickness measurements, corrosion and defects detection, electrical conductivity and magnetic permeability measurements. Recently, it has been exploited as a materials characterization technique, namely in solid state welding, since, compared to hardness, it is based in distinct physical phenomena. Electrical conductivity is controlled by electronic mobility, while hardness depends on crystal defects and thus a scale factor exists. This paper presents results of this characterization technique applied to multipass solid state friction stir processing (FSP) of AA1100 alloy. These results were compared to microstructural analysis and hardness measurements and show that eddy current is a feasibly, reliable and expedite technique to characterize processed materials. The electrical conductivity measured by eddy currents, maps more precisely structural features, while hardness does not. Measurement of electrical conductivity field suggests having potential to constitute an alternative and/or complement to hardness evaluation with the further advantage of being a non-destructive method.
Original languageEnglish
Title of host publicationAdvanced Materials Forum VI
EditorsA. M. P. Pinto, A. S. Pouzada
PublisherTrans Tech Publications Ltd
Pages715-720
VolumePts.1-2
DOIs
Publication statusPublished - 2013
Event6th International Materials Symposium, Materiais 2011 - Guimaraes, Portugal
Duration: 18 Apr 201120 Apr 2011

Publication series

NameMaterials Science Forum
PublisherTrans Tech Publications Ltd
Volume730-732
ISSN (Print)0255-5476

Conference

Conference6th International Materials Symposium, Materiais 2011
CountryPortugal
CityGuimaraes
Period18/04/1120/04/11

Fingerprint

Eddy currents
Hardness
Magnetic permeability measurement
Conductive materials
Thickness measurement
Electromagnetic induction
Crystal defects
Welding
Friction
Corrosion
Electric Conductivity
Processing

Keywords

  • Aluminium alloys
  • Eddy currents
  • Electrical conductivity
  • Friction stir processing

Cite this

Santos, T. J. G. D., Faria, J., Vilaça, P., & Miranda, R. M. M. (2013). Application of Eddy Currents in Processed Materials Structural Evaluation. In A. M. P. Pinto, & A. S. Pouzada (Eds.), Advanced Materials Forum VI (Vol. Pts.1-2, pp. 715-720). (Materials Science Forum; Vol. 730-732). Trans Tech Publications Ltd. https://doi.org/10.4028/www.scientific.net/MSF.730-732.715
Santos, Telmo Jorge Gomes dos ; Faria, Joana ; Vilaça, Pedro ; Miranda, Rosa Maria Mendes. / Application of Eddy Currents in Processed Materials Structural Evaluation. Advanced Materials Forum VI. editor / A. M. P. Pinto ; A. S. Pouzada. Vol. Pts.1-2 Trans Tech Publications Ltd, 2013. pp. 715-720 (Materials Science Forum).
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abstract = "Eddy currents are based on electromagnetic induction and analysis of electrical currents on conductive materials. This method is used for thickness measurements, corrosion and defects detection, electrical conductivity and magnetic permeability measurements. Recently, it has been exploited as a materials characterization technique, namely in solid state welding, since, compared to hardness, it is based in distinct physical phenomena. Electrical conductivity is controlled by electronic mobility, while hardness depends on crystal defects and thus a scale factor exists. This paper presents results of this characterization technique applied to multipass solid state friction stir processing (FSP) of AA1100 alloy. These results were compared to microstructural analysis and hardness measurements and show that eddy current is a feasibly, reliable and expedite technique to characterize processed materials. The electrical conductivity measured by eddy currents, maps more precisely structural features, while hardness does not. Measurement of electrical conductivity field suggests having potential to constitute an alternative and/or complement to hardness evaluation with the further advantage of being a non-destructive method.",
keywords = "Aluminium Alloys, Friction stir processing, electrical conductivity., Eddy currents, Aluminium alloys, Eddy currents, Electrical conductivity, Friction stir processing",
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note = "The authors acknowledge the Portuguese Foundation for the Science and Technology (FCT/MCTES) for its financial support of FSP conditions development via project PTDC/EMETME/ 10543/2008 - FRISURF.",
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Santos, TJGD, Faria, J, Vilaça, P & Miranda, RMM 2013, Application of Eddy Currents in Processed Materials Structural Evaluation. in AMP Pinto & AS Pouzada (eds), Advanced Materials Forum VI. vol. Pts.1-2, Materials Science Forum, vol. 730-732, Trans Tech Publications Ltd, pp. 715-720, 6th International Materials Symposium, Materiais 2011, Guimaraes, Portugal, 18/04/11. https://doi.org/10.4028/www.scientific.net/MSF.730-732.715

Application of Eddy Currents in Processed Materials Structural Evaluation. / Santos, Telmo Jorge Gomes dos; Faria, Joana; Vilaça, Pedro; Miranda, Rosa Maria Mendes.

Advanced Materials Forum VI. ed. / A. M. P. Pinto; A. S. Pouzada. Vol. Pts.1-2 Trans Tech Publications Ltd, 2013. p. 715-720 (Materials Science Forum; Vol. 730-732).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

TY - GEN

T1 - Application of Eddy Currents in Processed Materials Structural Evaluation

AU - Santos, Telmo Jorge Gomes dos

AU - Faria, Joana

AU - Vilaça, Pedro

AU - Miranda, Rosa Maria Mendes

N1 - The authors acknowledge the Portuguese Foundation for the Science and Technology (FCT/MCTES) for its financial support of FSP conditions development via project PTDC/EMETME/ 10543/2008 - FRISURF.

PY - 2013

Y1 - 2013

N2 - Eddy currents are based on electromagnetic induction and analysis of electrical currents on conductive materials. This method is used for thickness measurements, corrosion and defects detection, electrical conductivity and magnetic permeability measurements. Recently, it has been exploited as a materials characterization technique, namely in solid state welding, since, compared to hardness, it is based in distinct physical phenomena. Electrical conductivity is controlled by electronic mobility, while hardness depends on crystal defects and thus a scale factor exists. This paper presents results of this characterization technique applied to multipass solid state friction stir processing (FSP) of AA1100 alloy. These results were compared to microstructural analysis and hardness measurements and show that eddy current is a feasibly, reliable and expedite technique to characterize processed materials. The electrical conductivity measured by eddy currents, maps more precisely structural features, while hardness does not. Measurement of electrical conductivity field suggests having potential to constitute an alternative and/or complement to hardness evaluation with the further advantage of being a non-destructive method.

AB - Eddy currents are based on electromagnetic induction and analysis of electrical currents on conductive materials. This method is used for thickness measurements, corrosion and defects detection, electrical conductivity and magnetic permeability measurements. Recently, it has been exploited as a materials characterization technique, namely in solid state welding, since, compared to hardness, it is based in distinct physical phenomena. Electrical conductivity is controlled by electronic mobility, while hardness depends on crystal defects and thus a scale factor exists. This paper presents results of this characterization technique applied to multipass solid state friction stir processing (FSP) of AA1100 alloy. These results were compared to microstructural analysis and hardness measurements and show that eddy current is a feasibly, reliable and expedite technique to characterize processed materials. The electrical conductivity measured by eddy currents, maps more precisely structural features, while hardness does not. Measurement of electrical conductivity field suggests having potential to constitute an alternative and/or complement to hardness evaluation with the further advantage of being a non-destructive method.

KW - Aluminium Alloys

KW - Friction stir processing, electrical conductivity.

KW - Eddy currents

KW - Aluminium alloys

KW - Eddy currents

KW - Electrical conductivity

KW - Friction stir processing

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DO - 10.4028/www.scientific.net/MSF.730-732.715

M3 - Conference contribution

VL - Pts.1-2

T3 - Materials Science Forum

SP - 715

EP - 720

BT - Advanced Materials Forum VI

A2 - Pinto, A. M. P.

A2 - Pouzada, A. S.

PB - Trans Tech Publications Ltd

ER -

Santos TJGD, Faria J, Vilaça P, Miranda RMM. Application of Eddy Currents in Processed Materials Structural Evaluation. In Pinto AMP, Pouzada AS, editors, Advanced Materials Forum VI. Vol. Pts.1-2. Trans Tech Publications Ltd. 2013. p. 715-720. (Materials Science Forum). https://doi.org/10.4028/www.scientific.net/MSF.730-732.715