Magnetoelastic processes in steel

Abstract

A magnetoelastic model described previously has been computer programmed to allow averaging over polycrystalline grain orientations and integration of susceptibility to predict magnetization changes. In magnetoelastic (field and stress, H–σ) processes, Brown’s effective field due to stress on 90° domain walls has been extended with the differential susceptibility to describe magnetization changes in σH, σσ̄H, Hσ_∼, and HH̄σ_∼ processes for coercive fields and stresses: magnetization in the σH process initially exceeds and then drops below that due to H alone. Susceptibility in the σσ̄H process is predicted and was observed to be first higher and then lower than for H alone. Magnetoelastic sensitivity, H(σσ̄)ⁿ, was observed to increase with magnetization as predicted by this model and by Bozorth. No Villari reversal was observed.