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Steel characteristics measurement system using Barkhausen jump sum rate and magnetic field intensity and method of using same

Patent ·
OSTI ID:870897
 [1];  [2];  [3]
  1. Omer, IL
  2. Derwood, MD
  3. New Carrollton, MD
+ Show Author Affiliations

A steel hardness measurement system and method of using same are provided for measuring at least one mechanical or magnetic characteristic of a ferromagnetic sample as a function of at least one magnetic characteristic of the sample. A magnetic field generator subjects the sample to a variable external magnetic field. The magnetic field intensity of the magnetic field generated by the magnetic field generating means is measured and a signal sensor is provided for measuring Barkhausen signals from the sample when the sample is subjected to the external magnetic field. A signal processing unit calculates a jump sum rate first moment as a function of the Barkhausen signals measured by the signal sensor and the magnetic field intensity, and for determining the at least one mechanical or magnetic characteristic as a function of the jump sum rate first moment.

Research Organization:
American Iron and Steel Institute (Washington, DC)
DOE Contract Number:
FC07-93ID13205
Assignee:
American Iron and Steel Institute (Washington, DC)
Patent Number(s):
US 5619135
OSTI ID:
870897
Country of Publication:
United States
Language:
English

References (1)

Nondestructive evaluation of ferromagnetic materials by a ?magnetometer like? experimental arrangement journal June 1987

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/324/73/702/
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