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magnetic-particle inspection
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Book Chapter
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003232
EISBN: 978-1-62708-199-3
... Abstract Magnetic-particle inspection is a nondestructive testing technique used to locate surface and subsurface discontinuities in ferromagnetic materials. Beginning with an overview of the applications, advantages, and limitations of magnetic-particle inspection, this article provides...
Abstract
Magnetic-particle inspection is a nondestructive testing technique used to locate surface and subsurface discontinuities in ferromagnetic materials. Beginning with an overview of the applications, advantages, and limitations of magnetic-particle inspection, this article provides a detailed account of the portable power sources available for magnetization, and the different ways of generating magnetic fields using yokes, coils, central conductors, prod contacts, direct-contact, and induced current. In addition, the article discusses the characteristics and classification, and properties of magnetic particles and suspended liquids. Finally, the article outlines the types of discontinuities (surface and subsurface) that can be identified by magnetic-particle inspection and the importance of demagnetization after inspection.
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006468
EISBN: 978-1-62708-190-0
... Abstract Magnetic-particle inspection is a method of locating surface and subsurface discontinuities in ferromagnetic materials. This article discusses the applications and advantages and limitations of magnetic-particle inspection. It describes magnetic fields in terms of magnetized ring...
Abstract
Magnetic-particle inspection is a method of locating surface and subsurface discontinuities in ferromagnetic materials. This article discusses the applications and advantages and limitations of magnetic-particle inspection. It describes magnetic fields in terms of magnetized ring, magnetized bar, circular magnetization, longitudinal magnetization, and effects of flux direction. General applications, advantages, and limitations of the various magnetizing methods used in magnetic-particle inspection are listed in a table. The article discusses the items that must be considered in establishing a set of procedures for the magnetic-particle inspection of a specific part: type of current, type of magnetic particles, method of magnetization, direction of magnetization, magnitude of applied current, and equipment. It concludes with a discussion on demagnetization after magnetic-particle inspection.
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Published: 09 June 2014
Fig. 1 (a) Magnetic particle inspection missed 41% of cracked parts after 100% inspection and 7% after 200% inspection (803 cracked parts from 16,069 inspected, or ∼5%).(b) Magnetic particle inspection missed 43% of cracked parts after 100% inspection and 11% after 200% inspection (406 cracked
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Published: 01 January 2002
Fig. 19 Typical cracking found by fluorescent magnetic-particle inspection of the internal surface of a feedwater heater.
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Published: 15 January 2021
Fig. 24 Photograph of magnetic-particle inspection indications of stress-corrosion cracking (arrows) in a steam turbine rotor disk
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Published: 15 January 2021
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Published: 15 January 2021
Fig. 21 Magnetic-particle inspection of exemplar crankshaft fracture with ultraviolet (blacklight) illumination
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Published: 15 January 2021
Fig. 3 Probability of detection data for magnetic-particle inspection of steel parts based on data from Ref 8
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Published: 01 August 2018
Fig. 35 Magnetic-particle inspection of oil well tubing for (a) longitudinal and (b) circumferential discontinuities
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Published: 01 August 2018
Fig. 36 Magnetic-particle inspection for detection of discontinuities in consumable-insert root welds and final welds in carbon steel pipe. Dimensions given in inches
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Published: 30 August 2021
Fig. 26 Photograph of magnetic-particle inspection of pipe with crack colonies typical of stress-corrosion cracking (SCC)
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Published: 30 August 2021
Fig. 31 Wet fluorescent magnetic-particle inspection photograph of outside pipe surface showing an SCC colony near the rupture area. Multiple similar colonies were observed both upstream and downstream of the rupture.
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in Failures of Pressure Vessels and Process Piping
> Analysis and Prevention of Component and Equipment Failures
Published: 30 August 2021
Fig. 79 Typical cracking found by fluorescent magnetic-particle inspection of the internal surface of a feedwater heater
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Published: 01 August 2018
Fig. 13 Crack revealed using magnetic-particle inspection and white light. Courtesy of A. Antonatos
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Published: 01 August 2018
Fig. 14 Cracks revealed using magnetic-particle inspection and black light. Courtesy of A. Antonatos
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in Visual Examination and Photography in Failure Analysis
> Characterization and Failure Analysis of Plastics
Published: 15 May 2022
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in Visual Examination and Photography in Failure Analysis
> Characterization and Failure Analysis of Plastics
Published: 15 May 2022
Fig. 22 Magnetic particle inspection of Exemplar crankshaft fracture with ultraviolet (blacklight) illumination
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Published: 01 August 2018
Fig. 49 Digital image processing of a magnetic-particle-inspected connecting rod. (a) Nonuniform brightness (256 gray-level image). (b) Result of constant global thresholding. (c) Result of local adaptive thresholding. (d) Result of shape discrimination. Courtesy of Y.F. Cheu, General Motors
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Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006336
EISBN: 978-1-62708-179-5
..., or number of these anomalies exceeds the maximum allowed by the purchaser. The nondestructive methods include visual inspection, dimensional inspection, liquid penetrant inspection, magnetic-particle inspection, eddy-current inspection, radiographic inspection, ultrasonic inspection, resonant testing...
Abstract
Nondestructive inspection (NDI) methods for cast iron are used to ensure that the parts supplied perform as required by the purchaser. This article focuses on the principal nondestructive methods used to inspect for anomalies in cast irons and to determine if the volume, shape, size, or number of these anomalies exceeds the maximum allowed by the purchaser. The nondestructive methods include visual inspection, dimensional inspection, liquid penetrant inspection, magnetic-particle inspection, eddy-current inspection, radiographic inspection, ultrasonic inspection, resonant testing, and leak testing. The technique, strengths, and weaknesses of each of the nondestructive methods are also discussed.
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006467
EISBN: 978-1-62708-190-0
... of flaws encountered in the inspection of steel bars, including porosity, inclusions, scabs, cracks, seams, and laps. Inspection methods, such as magnetic-particle inspection. liquid penetrant inspection, ultrasonic inspection, and electromagnetic inspection, of steel bars are also described. The article...
Abstract
This article focuses on nondestructive inspection of steel bars. The primary objective in the nondestructive inspection of steel bars and wire is to detect conditions in the material that may be detrimental to the satisfactory end use of the product. The article discusses various types of flaws encountered in the inspection of steel bars, including porosity, inclusions, scabs, cracks, seams, and laps. Inspection methods, such as magnetic-particle inspection. liquid penetrant inspection, ultrasonic inspection, and electromagnetic inspection, of steel bars are also described. The article provides a discussion on electromagnetic systems, eddy-current systems, and magnetic permeability systems for detection of flaws on steel bars. It concludes with a description of nondestructive inspection of steel billets.
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