The local internal stress in ferromagnetic alloys. Dislocation–solute interaction model for local internal stress source

Abstract

In order to elucidate the Raleigh and Left Shift phenomena encountered in the investigations into damping capacity (internal friction) of ferromagnetic alloys (Acta Metall Sin 34 (1998) 1039; Trans Jpn Inst Met 25 (1984) 891; Trans Jpn Inst Met 20 (1979) 409; Mater Sci Forum 119–121 (1993) 415; Metall Mater Trans A 25 (1994) 111), the solute atom model (Mater Design (in press)) for the local internal stress source is modified and replaced by the dislocation–solute interaction model proposed by the authors. The coercive force as well as crystal lattice parameter of FeCrAl and FeCrAlSi alloys was measured and the local internal stress of these alloys was discussed. It is pointed out that only when the alloy is fully re-crystallized, the potential of damping capacity could be fully developed, and at the pre-requisite of which do not lower the energy density of domain walls (Mater Design 21 (2000) 541), to choose those alloying element that distort crystal lattice slightly is benefit to improve the damping capacity of ferromagnetic alloys.