Title :
Influence of applied tensile stress on magnetic properties of surface-crystallized Fe-based amorphous ribbons
Author :
Sawairi, H. ; Sato, T.
Author_Institution :
Fac. of Eng., Tokyo Inst. of Technol., Japan
fDate :
9/1/1999 12:00:00 AM
Abstract :
Fe-based amorphous alloys containing Al or Ti as impurities become surface-crystallized during casting, with a resultant increase in their soft magnetic properties. This phenomenon is known to be caused by compressive stress induced by surface crystallization, but there have been few systematic investigations of this compressive stress. In the present study, the compressive stress was found to range from 1 to 15 MPa, and is proportional to the ratio of the surface crystalline layer thickness to the ribbon thickness. The relationship between the compressive stress and core losses has been examined. This result shows that the increase of the core losses is mainly caused by the compressive stress induced by the surface crystalline layer
Keywords :
aluminium alloys; amorphous magnetic materials; casting; crystallisation; ferromagnetic materials; internal stresses; iron alloys; magnetic cores; magnetic leakage; magnetomechanical effects; metallic glasses; soft magnetic materials; surface magnetism; surface phase transformations; titanium alloys; Al; Fe-based amorphous alloys; FeAlTi; Ti; applied tensile stress; casting; compressive stress; core losses; magnetic properties; soft magnetic properties; surface crystalline layer thickness; surface crystallization; surface-crystallized Fe-based amorphous ribbons; Aluminum alloys; Amorphous materials; Casting; Compressive stress; Core loss; Crystallization; Impurities; Magnetic properties; Tensile stress; Titanium alloys;
Journal_Title :
Magnetics, IEEE Transactions on
