Effects of primary recrystallization texture and inhibitor characteristic on the secondary recrystallization of Fe-Ga alloy thin sheet induced by nano-sized inhibitor

Abstract

Sharp Goss texture and excellent magnetostriction coefficient were successfully developed in Fe–Ga alloy thin sheet by composite nano-sized inhibitor. Various primary recrystallization textures in Fe–Ga alloy thin sheets were produced by different cold rolling reductions. The effect of primary recrystallization texture and inhibitor characteristics on the secondary recrystallization of Fe-Ga alloy thin sheet was investigated. The results show that the nano-sized sulfide provides a sufficient pinning force to the normal grain growth of primary grains. The increase in size and distribution width of precipitation during high-temperature annealing indicates the preferentially weakened pinning force. Goss grains in the primary recrystallization do not predominate in number and grain size, but it is surrounded by a higher fraction of high energy grain boundaries (HEGBs). Complete secondary recrystallization of Goss grains can be induced by the preferentially weakened inhibitor and the priority of grain boundary energy and mobility around Goss grains. The cold-rolling reductions have a significant influence on the secondary recrystallization by changing the primary recrystallization texture and the grain boundary characteristics. Based on the relationship between the anisotropic grain boundary energy and mobility and the misorientation angle, a multi-parameter interaction model is proposed to explain the nucleation and development of secondary recrystallization Goss texture under the pinning force.