Metal treatment – Process of modifying or maintaining internal physical... – Magnetic materials
Patent
1999-03-03
2000-11-28
Sheehan, John
Metal treatment
Process of modifying or maintaining internal physical...
Magnetic materials
148313, H01F 100
Patent
active
061530204
ABSTRACT:
An article comprising an alloy exhibiting high magnetostriction in relatively low applied magnetic fields is provided, the alloy capable of being formed in a relatively easy manner and having desirable physical properties. The Co--Fe alloy of the invention exhibits a magnetostriction of at least 100.times.10.sup.-6 in a magnetic field less than 400 Oe, advantageously in a magnetic field less than 100 Oe. The alloy is formed by plastically deforming the alloy, e.g., by cold rolling, to a reduction in cross-sectional area of at least 50%, and then heat treating the alloy to induce recrystallization. This combination of plastic deformation and recrystallization was found to provide desirable grain growth and microstructure. The resultant alloy is useful in a variety of device components, including transducers, frequency filters, signal delay lines, and optical fiber grating devices.
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Chen Li-Han
Jin Sung-ho
Klemmer Timothy J.
Mavoori Hareesh
Lucent Technologies
Rittman Scott J.
Sheehan John
LandOfFree
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