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magnetic permeability

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Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001811
EISBN: 978-1-62708-241-9
... of electromagnetic induction and is sensitive to the electrical conductivity and magnetic permeability of conductive materials. Eddy current evaluation technique can be applied on both conductive and nonconductive materials depending upon their permeability: however; the permeability must not be equal to one...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001369
EISBN: 978-1-62708-215-0
... on the side opposite the chipped area. Examination using a magnetic yoke and magnetic ink revealed a crack and outlined an area of magnetic permeability different from the base metal ( Fig. 2 ) A crane long-travel worm drive shaft was found to be chipped during unpacking after delivery. Results...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001516
EISBN: 978-1-62708-234-1
.... Magnetic heads are made of a high permeability material, thin laminations of which are cemented to provide a gap for generating the recording field or collecting the media flux for writing and reading data, respectively. During the last decade the storage density of a magnetic disk-drive has doubled...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001581
EISBN: 978-1-62708-235-8
... a max. carbon of 0.035% with nickel of 8.00 to 12.00%. Type 304H has carbon of 0.04 to 0.10%. Magnetic response Table 2 Magnetic response Alloy and condition Permeability at 200 Oersteds 304 solution annealed 1 1.004 304 85% cold worked 2 3.0 to 5.0 305 85% cold worked...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006764
EISBN: 978-1-62708-295-2
... of detecting surface discontinuities by magnetic-particle inspection, liquid penetrant inspection, and eddy-current testing. The major NDE methods for internal (volumetric) inspection in failure analysis also are described. eddy-current testing liquid penetrant inspection magnetic-particle inspection...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001834
EISBN: 978-1-62708-241-9
... the outward diffusion of iron ions; therefore, iron-rich scales likely form. Water vapor forms more cracks and pores in the scale, thereby accelerating oxidation. Water vapor and dissolved hydrogen enhance oxygen transport or increase permeability in α-Fe to promote oxidation [ 9 ]. The microstructural...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006761
EISBN: 978-1-62708-295-2
..., and the nature of the applied stresses. In contrast, physical properties are those typically measured by methods not requiring the application of an external mechanical force (or load). Typical examples of physical properties are density, magnetic properties (e.g., permeability), thermal conductivity and thermal...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006782
EISBN: 978-1-62708-295-2
... for sectioning, depending on sample type and size. Nondestructive testing, if required, can be performed on the entire sample or on segments of the sample as needed. Nondestructive test methods include radiography (x-ray), fluorescent penetrant inspection (FPI), magnetic-particle inspection (MPI...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003551
EISBN: 978-1-62708-180-1
... of materials. They are often called “engineering ceramics” or “advanced ceramics,” subdivided into “structural ceramics” (which exhibit superior mechanical properties as compared to traditional ceramics) and “functional ceramics” (which exhibit superior electrical, magnetic, or optical properties, again...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003549
EISBN: 978-1-62708-180-1
... metal may be useful to remove scale deposits as in the evaluation of the pitting. After the corrosion deposits have been removed, additional nondestructive testing may prove useful. Magnetic particle examination, penetrant examination, eddy current testing, and ultrasonic testing are a few...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.9781627082952
EISBN: 978-1-62708-295-2
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003508
EISBN: 978-1-62708-180-1