Correlative effect of critical parameters for η recrystallization texture development in rolled Fe81Ga19 sheet: Modeling and experiment

Strong eta (<100>parallel to RD, rolling direction) recrystallization texture is successfully developed through thickness in Fe81Ga19 sheets with fine-grained microstructure by primary recrystallization process. An excellent combination of magnetic and mechanical properties is achieved with magnetostriction coefficient of 150 ppm, yield strength of 608 MPa and elongation of 11.7%. Quantitative macro/micro-texture analysis indicates that the enhanced eta texture derives from number and size advantages established by preferred nucleation and efficient growth. The highly attractive phenomenon is that deformed grains with alpha (<110>parallel to RD) texture can be extensively consumed by eta recrystallized grains in addition to deformed grains with gamma (<111>parallel to ND, normal direction) texture. A physical model is proposed that well describes the relationship between strong eta texture development in competition with gamma and alpha recrystallization textures, where several critical parameters characteristic of deformation texture and micro-structure are included. The correlative effect of these parameters are figured out based on the modeling and experimental data. The present work can provide an effective method for recrystallization texture design and control in body-centered cubic alloy sheets. (C) 2019 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.