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

Volume

35

Issue

5

fYear

1999

fDate

9/1/1999 12:00:00 AM

Firstpage

3553

Lastpage

3555

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;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.800587

Filename

800587