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

Full Text
View Full Text

Other works cited 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

Similar records in DOepatents and OSTI.GOV collections:

Method of thermomagnetically processing an aluminum alloy

Patent Ludtka, Gerard M. ; Rios, Orlando ; Weiss, David

A method of thermomagnetically processing an aluminum alloy entails heat treating an aluminum alloy, and applying a high field strength magnetic field of at least about 2 Tesla to the aluminum alloy during the heat treating. The heat treating and the application of the high field strength magnetic field are carried out for a treatment time sufficient to achieve a predetermined standard strength of the aluminum alloy, and the treatment time is reduced by at least about 50% compared to heat treating the aluminum alloy without the magnetic field.
Full Text Available August 2018
Apparatus and method for forming a workpiece surface into a non-rotationally symmetric shape

Patent Dow, Thomas A. ; Garrard, Kenneth P. ; Moorefield, II, George M. ; Taylor, Lauren W.

A turning machine includes a controller for generating both aspherical and non-symmetrical shape components defining the predetermined shape, and a controller for controlling a spindle and a positionable cutting blade to thereby form a predetermined non-rotationally symmetric shape in a workpiece surface. The apparatus includes a rotatable spindle for rotatably mounting the workpiece about an axis, a spindle encoder for sensing an angular position of the rotating workpiece, the cutting blade, and radial and transverse positioners for relatively positioning the cutting blade and workpiece along respective radial and transverse directions. The controller cooperates with a fast transverse positioner for positioningmore »« less
Full Text Available November 1995
Method and apparatus for automated processing and aliquoting of whole blood samples for analysis in a centrifugal fast analyzer

Patent Burtis, Carl A. ; Johnson, Wayne F. ; Walker, William A.

A rotor and disc assembly for use in a centrifugal fast analyzer. The assembly is designed to process multiple samples of whole blood followed by aliquoting of the resultant serum into precisely measured samples for subsequent chemical analysis. The assembly requires minimal operator involvement with no mechanical pipetting. The system comprises (1) a whole blood sample disc, (2) a serum sample disc, (3) a sample preparation rotor, and (4) an analytical rotor. The blood sample disc and serum sample disc are designed with a plurality of precision bore capillary tubes arranged in a spoked array. Samples of blood are loadedmore »« less
Full Text Available January 1988
Apparatus and method for enhanced chemical processing in high pressure and atmospheric plasmas produced by high frequency electromagnetic waves

Patent Efthimion, Philip C. ; Helfritch, Dennis J.

An apparatus and method for creating high temperature plasmas for enhanced chemical processing of gaseous fluids, toxic chemicals, and the like, at a wide range of pressures, especially at atmospheric and high pressures includes an electro-magnetic resonator cavity, preferably a reentrant cavity, and a wave guiding structure which connects an electro-magnetic source to the cavity. The cavity includes an intake port and an exhaust port, each having apertures in the conductive walls of the cavity sufficient for the intake of the gaseous fluids and for the discharge of the processed gaseous fluids. The apertures are sufficiently small to prevent themore »« less
Full Text Available November 1989
Method and apparatus for optimizing the efficiency and quality of laser material processing

Patent Susemihl, Ingo

The efficiency of laser welding and other laser material processing is optimized according to this invention by rotating the plane of polarization of a linearly polarized laser beam in relation to a work piece of the material being processed simultaneously and in synchronization with steering the laser beam over the work piece so as to keep the plane of polarization parallel to either the plane of incidence or the direction of travel of the beam in relation to the work piece. Also, depending to some extent on the particular processing being accomplished, such as welding or fusing, the angle ofmore »« less
Full Text Available January 1990