Soft magnetic Ni-Fe and Co-Fe alloys - some physical and metallurgical aspects

Abstract

The diversity of properties of soft magnetic alloys has been vastly increased in recent years. In this paper a number of the physical and metallurgical aspects are discussed, particularly those which influence the properties of the technically important nickel-iron alloys. These include the composition of the alloy, isotropic and anisotropic ordering processes, the microstructure, textures, non-magnetic inclusions and precipitation processes. These factors are, on the other hand, partially determined by manufacturing parameters such as the type of melting, the degree of cold rolling and the heat treatment.