Title :
Micromagnetic surface measurements for evaluation of surface modifications due to cyclic stress
Author :
Chen, Z.J. ; Strom, A. ; Jiles, D.C.
Author_Institution :
Ames. Lab., Iowa State Univ., IA, USA
fDate :
11/1/1993 12:00:00 AM
Abstract :
The results of inspection fatigue damage by two magnetic nondestructive methods are presented. The magnetic hysteresis method can detect fatigue damage in the later stages of fatigue life. Magnetic Barkhausen signals, being highly sensitive to the surface condition of a material, show continuous change during the whole fatigue process. The Barkhausen effect measurement, aided by signal processing techniques, is therefore capable of monitoring surface modifications due to cyclic stress
Keywords :
Barkhausen effect; coercive force; computerised monitoring; fatigue testing; inspection; magnetic hysteresis; magnetic permeability; magnetic variables measurement; nondestructive testing; signal processing; steel; Barkhausen effect measurement; coercivity; computer controlled inspection system; cyclic stress; fatigue life; fatigue test; inspection fatigue damage; magnetic Barkhausen signal; magnetic hysteresis; magnetic hysteresis method; magnetic nondestructive methods; micromagnetic surface measurement; signal processing techniques; steel; surface modification monitoring; Coercive force; Condition monitoring; Fatigue; Magnetic hysteresis; Magnetic materials; Micromagnetics; Microstructure; Permeability; Signal processing; Stress measurement;
Journal_Title :
Magnetics, IEEE Transactions on
