Nucleation and the origin of the (110)[001] goss texture in rolled 3 % Si-Fe alloys

Abstract

The critical embryo size r for nucleation in a rolled metal is given as 2gamma/E-B, where gamma is the interface energy and E-B is the elastic strain energy per unit volume at a distance L from the dislocation core. Based on theory, at-a distance L, an embryo with a lower interface energy, and thus a smaller critical size, is easier to form due to the smaller activation free energy than an embryo with a higher interface energy, and thus a larger critical size. Therefore, the crystallographic orientation of the embryo takes after that of the rolled metal. The (110)[001] Goss texture in 3% Si-Fe alloy strips is not intrinsic, and whether the final main texture after heat treatment will be (110) [001] or (110)[uvw](not equal[001]) depends on the flow rate of hydrogen and the final thickness reduction.