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

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. 7 figs.
Inventors:
; ;
Issue Date:
OSTI Identifier:
462861
Assignee:
American Iron and Steel Inst., Washington, DC (United States) PTO; SCA: 360103; 420500; PA: EDB-97:061849; SN: 97001767255
Patent Number(s):
US 5,619,135/A/
Application Number:
PAN: 8-503,263
Contract Number:
FC07-93ID13205
Resource Relation:
Other Information: PBD: 8 Apr 1997
Research Org:
American Iron and Steel Institute
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 42 ENGINEERING NOT INCLUDED IN OTHER CATEGORIES; STEELS; HARDNESS; MAGNETIC TESTING; MAGNETIC PROPERTIES; MAGNETIC FIELDS; DATA PROCESSING; MEASURING INSTRUMENTS