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ferromagnetic metals

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Published: 01 December 1998
Fig. 5 Shredder and sorter for scrap automobiles. (a) Vehicles are shredded. Air separates out most light nonmetals (1) from heavier materials (2). (b) Magnetic belt separates ferromagnetic metals from nonmagnetic materials. (c) Heavy-metal flotation. (d) Melting furnaces further sort out More
Image
Published: 01 January 1990
Fig. 16 Ferromagnetic Curie temperatures of several ferrous-group metallic glasses as a function of the total valence of the metallic component. All the alloys have fixed metalloid concentrations of 10 at.% P and 10 at.% B. Also shown are trends in the Curie temperature for related crystalline More
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003234
EISBN: 978-1-62708-199-3
... that are detectable by eddy-current methods. eddy-current inspection eddy-current instruments edge effect electrical conductivity ferromagnetic metals magnetic permeability nondestructive testing nonferromagnetic metals skin effect EDDY-CURRENT INSPECTION is based on the principles...
Series: ASM Handbook Archive
Volume: 10
Publisher: ASM International
Published: 01 January 1986
DOI: 10.31399/asm.hb.v10.a0001751
EISBN: 978-1-62708-178-8
... encompasses any system containing a high concentration of paramagnetic ions with predominantly ferromagnetic exchange coupling. Materials that exhibit ferromagnetism in at least some temperature regime and metallic ferromagnetic materials will be considered in this article. Among the materials of interest...
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...
Series: ASM Handbook
Volume: 4C
Publisher: ASM International
Published: 09 June 2014
DOI: 10.31399/asm.hb.v04c.a0005896
EISBN: 978-1-62708-167-2
.... The article also discusses the magnetic properties of diamagnetic, paramagnetic, ferromagnetic, ferrimagnetic, antiferromagnetic, and metamagnetic materials. coefficient of linear thermal expansion density electrical resistivity ferrous metals magnetic properties nonferrous metals nonmetallic...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003153
EISBN: 978-1-62708-199-3
... properties of amorphous metals and conventional crystalline soft magnetic materials. Fig. 9 Saturation induction and relative permeability versus coercivity for commercial available amorphous metals (AM) and crystalline soft ferromagnets. Permeabilities for amorphous metal depend on heat treatments...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006057
EISBN: 978-1-62708-175-7
... possible in metal injection molding parts. The article also discusses ferromagnetic cores used in alternating current applications and some permanent magnets, such as rare earth-cobalt magnets and neodymium-iron-boron (neo) magnets. ferritic stainless steel ferromagnetic cores hysteresis loss...
Image
Published: 01 December 1998
Fig. 9 Saturation induction and relative permeability versus coercivity for commercial available amorphous metals (AM) and crystalline soft ferromagnets. Permeabilities for amorphous metal depend on heat treatments and are indicated by shaded bars. More
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003086
EISBN: 978-1-62708-199-3
... and 4 . It should be noted that there are several types of magnetism found in metals, and the temperatures at which they change from one type to another are also given in Table 3 . As seen in the table, iron is not the only metal to exhibit ferromagnetism. Cobalt, nickel, and possibly promethium also...
Image
Published: 01 January 1990
Fig. 4 The various magnetic temperatures (lower portion) and effective magnetic moments (upper portion) of the lanthanide metals. The paramagnetic ordering temperatures, θ p , which can be negative (Ce) or positive (the other lanthanides) is obtained at high temperatures above the magnetic More
Series: ASM Handbook
Volume: 4C
Publisher: ASM International
Published: 09 June 2014
DOI: 10.31399/asm.hb.v04c.a0005857
EISBN: 978-1-62708-167-2
... particle technique is suitable only for ferromagnetic metals and requires the application of a strong magnetic field, but it provides a more sensitive and even more certain means of detection. Ultrasonic and eddy-current testing, quantitative magnetic flux leakage techniques, and the alternating...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001400
EISBN: 978-1-62708-173-3
... mechanisms noted above. The overall efficiency of induction heating nonferrous metals is 50 to 75%. Values are approximately 75% for magnetic metals that are below the Curie temperature (i.e., in the ferromagnetic state). Selection of a power frequency depends on the type of soldering material...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006442
EISBN: 978-1-62708-190-0
... ). In transition metals (including iron, cobalt, and nickel), the magnetic moment, and therefore ferromagnetism are essentially due to spin-spin exchange interactions, with insignificant or no contributions from electron orbital angular momentum ( Ref 7 , 25 ). The ferrite, or body-centered cubic (bcc) iron...
Series: ASM Handbook Archive
Volume: 10
Publisher: ASM International
Published: 01 January 1986
DOI: 10.31399/asm.hb.v10.a0001752
EISBN: 978-1-62708-178-8
... on ferromagnetic nuclear resonance and nuclear quadrupole resonance, and illustrates the experimental arrangement of NMR with a block diagram. It also presents several application examples. electric quadrupole moment ferromagnetic nuclear resonance magnetic dipole moment nuclear magnetic resonance...
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
..., such as 17-4 PH, 17-7 PH, and 15-4 PH stainless steels, are magnetic after aging. Metals can lose their ferromagnetic properties above a characteristic temperature called the Curie point. Although this temperature varies for different materials, the Curie point for most ferromagnetic materials...
Series: ASM Handbook
Volume: 4C
Publisher: ASM International
Published: 09 June 2014
DOI: 10.31399/asm.hb.v04c.a0005877
EISBN: 978-1-62708-167-2
... with the displacement current could be neglected ( Ref 1 ). For induction heating processes the condition equation ( Eq 5 ) always is satisfied ( Ref 1 ). This can be checked for a simple case. The electric conductivity of a heated metal (γ) is on the order of at least 10 6 S/m. Even if the frequency of field current...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006056
EISBN: 978-1-62708-175-7
... to note that ASTM B886 allows for the calibration of instrumentation by pure ferromagnetic materials. Within the hard metal industry, cobalt and nickel standards are most frequently used. The calibration material must be known when comparing magnetic saturation values from different manufacturers...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003232
EISBN: 978-1-62708-199-3
... as flaws. Demagnetization after Inspection All ferromagnetic materials retain a residual magnetic field to some degree after being magnetized. This field is negligible in magnetically soft metals, but in harder metals, it can be comparable to the intense fields associated with the special alloys...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003228
EISBN: 978-1-62708-199-3
.... These techniques rely on the change in magnetic properties of the material caused by stress; this is known as the magnetoelastic effect. These techniques, therefore, apply only to ferromagnetic materials, such as steel. Rapid Identification of Metals and Alloys Quality assurance during the fabrication...