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Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003234
EISBN: 978-1-62708-199-3
... Abstract Eddy-current inspection is a nondestructive evaluation method based on the principles of electromagnetic induction. Eddy-current methods are used to identify or differentiate a wide variety of physical, structural, and metallurgical conditions in electrically conductive ferromagnetic...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006450
EISBN: 978-1-62708-190-0
... Abstract Eddy-current inspection is based on the principles of electromagnetic induction and is used to identify or differentiate among a wide variety of physical, structural, and metallurgical conditions in electrically conductive ferromagnetic and nonferromagnetic metals and metal parts...
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Published: 01 August 2018
Fig. 25 Schematics of eddy-current flow. (a) Eddy-current flow around a probe coil for a sound billet. (b) Eddy currents flowing around the seam in a defective billet, thus altering the electrical loading on the probe coil More
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Published: 31 October 2011
Fig. 12 Example of array eddy current examination for a friction stir weld in an aluminum plate. (a) Photo showing friction stir weld in an aluminum specimen with locations of flaws. (b) Test results at 20 kHz. (c) Test results at 480 kHz More
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Published: 01 January 2006
Fig. 21 Principle of eddy current material testing. Source: Ref 2 , 26 More
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Published: 01 December 1998
Fig. 1 Two common types of inspection coils and the patterns of eddy-current flow generated by the exciting current in the coils. Solenoid-type coil is applied to cylindrical or tubular parts; pancake-type coil, to a flat surface. (a) Solenoid-type coil. (b) Pancake-type coil More
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Published: 01 December 1998
Fig. 2 Effect of a crack on the pattern of eddy-current flow in a pipe More
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Published: 01 December 1998
Fig. 3 Principal elements of a typical system for eddy current inspection of bar or tubing. See description in text. More
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Published: 01 December 1998
Fig. 7 Variation in density of eddy current as a function of depth below the surface of a conductor, known as skin effect More
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Published: 01 December 1998
Fig. 9 Types and applications of coils used in eddy-current inspection. (a) Probe-type coil applied to a flat plate for crack detection. (b) Horseshoe-shape, or U-shape, coil applied to a flat plate for laminar-flaw detection. (c) Encircling coil applied to a tube. (d) Internal, or bobbin-type More
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Published: 01 December 1998
Fig. 11 Four types of eddy-current instruments. (a) A simple arrangement, in which voltage across the coil is monitored. (b) Typical impedance bridge. (c) Impedance bridge with dual coils. (d) Impedance bridge with dual coils and a reference sample in the second coil More
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Published: 01 December 2008
Fig. 3 Eddy current inspection. The presence of a flaw alters the magnitude of current. More
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Published: 01 June 2016
Fig. 5 Basic configuration of eddy-current electrical conductivity meter More
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Published: 01 June 2016
Fig. 7 Eddy-current conductivity as a function of aging time of unstretched 2024 aluminum alloy at different aging temperatures. Source: Ref 6 More
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Published: 01 June 2016
Fig. 8 Eddy-current conductivity and hardness as a function of aging times of aluminum alloy 2024. (a) Aged at 150 °C (302 °F). (b) Aged at 190 °C (374 °F). Source: Ref 6 More
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Published: 01 August 2018
Fig. 12 Example of array eddy-current examination for a friction stir weld in an aluminum plate. (a) Photo showing friction stir weld in an aluminum specimen with locations of flaws. (b) Test results at 20 kHz. (c) Test results at 480 kHz More
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Published: 01 August 2018
Fig. 37 Example of automated ultrasonic and eddy-current phased array system for bar inspection. Used with permission of Olympus More
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Published: 01 August 2018
Fig. 1 Two common types of inspection coils and the patterns of eddy current flow generated by the exciting current in the coils. Solenoid-type coil is applied to cylindrical or tubular parts; pancake-type coil, to a flat surface. More
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Published: 01 August 2018
Fig. 2 Effect of a crack on the pattern of eddy current flow in a pipe More
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Published: 01 August 2018
Fig. 3 Principal elements of a typical system for eddy-current inspection of bar or tubing. See description in text. More