Secondary Recrystallization Texture and Magnetostriction in Fe-Ga Alloy Ultra-Thin Sheet

Abstract

The 0.15 mm thick Fe-Ga alloy ultra-thin thin sheets with high magnetostriction were successfully produced by the conventional processing route including hot rolling and two-stage cold rolling with intermediate annealing and primary and secondary recrystallization annealing. The evolution of microstructure, texture, and inhibitor was briefly investigated. The primary recrystallization texture is characterized by strong <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$\gamma $ </tex-math></inline-formula> fiber with the peak at {111} <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$\langle 112\rangle $ </tex-math></inline-formula> component and weak Goss component through sheet thickness. The dispersedly distributed nano-precipitates provide a sufficient pinning effect on the primarily recrystallized grains and induce abnormal grain growth of Goss grains. Well-developed secondary recrystallized Goss grains with centimeter size and maximum magnetostriction (3/ <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$2\lambda \text{s}$ </tex-math></inline-formula> ) of 229 ppm were achieved in Fe-Ga alloy ultra-thin sheet.