Anisotropy of Amorphous Metal Induced by High Temperature Stress Application

Effect of uniaxial stress application to Fe-Si-B amorphous metal has been investigated below and above glass transition temperature. Uniaxial stress effect was characterized, as a magnetic permeability measurement, by using Magnetic Permeability Resonance (MPR) method. The values of horizontal and vertical permeabilities from stress applied direction were measured. Amorphous metal, which is heat treated at near glass transition temperature, showed significant anisotropy of permeabilities with stress application. This anisotropy is the result from atomic structural change, which is caused by viscosity flow under amorphous state.