Coincidence grain boundary and (100)[011] secondary recrystallization in Fe-3% Si

Abstract

Secondary recrystallization texture consisting of (100)[011], as a major component, and (100)[001], as a minor component, are evolved from cross rolled and annealed Fe-3% Si. On the assumption that a Σ7 boundary is more mobile than a Σ9 boundary, the mechanism of the evolution of (100)[001] and (100)[011] secondary recrystallization can be explained as follows. (100)[011] grains are evolved as this orientation has the second highest value of I C Σ7 and the highest value of P CN Σ7 among orientations with P CN Σ1 values less than 100. Here the I C Σ7 value is the intensity of Σ7 oriented grains calculated for the nucleus orientation N, namely (100)[011], and the P CN Σ7 value is a product of the intensity of a nucleus orientation ( I N) and the I C Σ7 in matrix texture before grain growth. P CN Σ1 value is a product of the intensity of a nucleus orientation ( I N) and the intensity of Σ1 oriented grains ( I C Σ1) for the nucleus orientation (100)[011] in the matrix texture before grain growth (100)[001] grains are evolved as this orientation has effectively the highest value of I C Σ7 in the matrix texture before grain growth. The number of (100)[001] grains evolved is smaller than that of (100)[011] grains due to the low intensity of the nucleus orientation ( I N = (100)[001]).