Method of and apparatus for thermomagnetically processing a workpiece

Title: Method of and apparatus for thermomagnetically processing a workpiece

A method of thermomagnetically processing a material includes disposing a workpiece within a bore of a magnet; exposing the workpiece to a magnetic field of at least about 1 Tesla generated by the magnet; and, while exposing the workpiece to the magnetic field, applying heat energy to the workpiece at a plurality of frequencies to achieve spatially-controlled heating of the workpiece. An apparatus for thermomagnetically processing a material comprises: a high field strength magnet having a bore extending therethrough for insertion of a workpiece therein; and an energy source disposed adjacent to an entrance to the bore. The energy source is an emitter of variable frequency heat energy, and the bore comprises a waveguide for propagation of the variable frequency heat energy from the energy source to the workpiece.

Inventors:: Kisner, Roger A.; Rios, Orlando; Wilgen, John B.; Ludtka, Gerard M.; Ludtka, Gail M.

Issue Date:: 2014-08-05

OSTI Identifier:: 1150015

Assignee:: UT-Battelle, LLC (Oak Ridge, TN) ORNL

Patent Number(s):: 8,795,444

Application Number:: 14/186,385

Contract Number:: AC05-000R22725

Resource Relation:: Patent File Date: 2014 Feb 21

Research Org:: ORNL (Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States))

Sponsoring Org:: USDOE

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE

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Works referenced in this record:

Thermal and high magnetic field treatment of materials and associated apparatus
patent, June 2010

Kisner, Roger A.; Wilgen, John B.; Ludtka, Gerard M.
US Patent Document 7,745,765
URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect2=PTO1&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&d=PALL&RefSrch=yes&Query=PN%2F7745765

Using magnetic field gradients to control the directional solidification of alloys and the growth of single crystals
journal, September 2004

Ganapathysubramanian, Baskar; Zabaras, Nicholas
Journal of Crystal Growth, Vol. 270, Issue 1-2, p. 255-272
DOI: 10.1016/j.jcrysgro.2004.06.020

In situ evidence of enhanced transformation kinetics in a medium carbon steel due to a high magnetic field
journal, July 2004

Ludtka, G. M.; Jaramillo, R. A.; Kisner, R. A.
Scripta Materialia, Vol. 51, Issue 2, p. 171-174
DOI: 10.1016/j.scriptamat.2004.03.029

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