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Title: Method for residual stress relief and retained austenite destabilization

Abstract

A method using of a magnetic field to affect residual stress relief or phase transformations in a metallic material is disclosed. In a first aspect of the method, residual stress relief of a material is achieved at ambient temperatures by placing the material in a magnetic field. In a second aspect of the method, retained austenite stabilization is reversed in a ferrous alloy by applying a magnetic field to the alloy at ambient temperatures.

Inventors:
Issue Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1174976
Patent Number(s):
6773513
Application Number:
10/217,396
Assignee:
UT-Battelle LLC (Oak Ridge, TN)
Patent Classifications (CPCs):
C - CHEMISTRY C21 - METALLURGY OF IRON C21D - MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS
DOE Contract Number:  
AC05-00OR22725
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Ludtka, Gerard M. Method for residual stress relief and retained austenite destabilization. United States: N. p., 2004. Web.
Ludtka, Gerard M. Method for residual stress relief and retained austenite destabilization. United States.
Ludtka, Gerard M. Tue . "Method for residual stress relief and retained austenite destabilization". United States. https://www.osti.gov/servlets/purl/1174976.
@article{osti_1174976,
title = {Method for residual stress relief and retained austenite destabilization},
author = {Ludtka, Gerard M.},
abstractNote = {A method using of a magnetic field to affect residual stress relief or phase transformations in a metallic material is disclosed. In a first aspect of the method, residual stress relief of a material is achieved at ambient temperatures by placing the material in a magnetic field. In a second aspect of the method, retained austenite stabilization is reversed in a ferrous alloy by applying a magnetic field to the alloy at ambient temperatures.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2004},
month = {8}
}

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Works referenced in this record:

Magnetoplastic effect in non-magnetic crystals and internal friction
journal, September 1994


Effect of electric current pulses on fatigue characteristics of polycrystalline copper
journal, September 1991


Possible effects of magnetic fields in fatigue
journal, May 1993


Exploration on repairing fatigue damage of steel specimens with magnetic treatment
journal, March 1999


Micromechanism of residual stress reduction by low frequency alternating magnetic field treatment
journal, May 2002


Slowing down metal fatigue damage with a magnetic field
journal, September 1993


Effects of a Pulsed Magnetic Treatment on the Fatigue of Low Carbon Steel
journal, April 1998