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U.S. Department of Energy
Office of Scientific and Technical Information

Method for deriving information regarding stress from a stressed ferromagnetic material

Patent ·
OSTI ID:867798
A non-destructive evaluation technique for deriving stress in ferromagnetic materials including deriving anhysteretic and hysteresis magnetization curves for the material in both unstressed and stressed states. The anhysteretic curve is expressed as a Langevin function. The stress is expressed as an equivalent magnetic field dependent on stress and change of magnetostriction with magnetization. By measurement of these bulk magnetic properties, stress can be derived.
Research Organization:
Ames Laboratory (AMES), Ames, IA; Iowa State University, Ames, IA (US)
DOE Contract Number:
W-7405-ENG-82
Assignee:
Iowa State University Research Foundation, Inc. (Ames, IA)
Patent Number(s):
US 5012189
Application Number:
07/354,819
OSTI ID:
867798
Country of Publication:
United States
Language:
English