Ordered Structure, Dislocation, and Grain Boundary Character Distribution and Their Effects on Warm Deformation in Soft‐Magnetic Fe–6.9Si–0.01B Alloy

Abstract

The ordered structure, dislocation, and grain boundary character distribution (GBCD) in warm‐rolled Fe–6.9Si–0.01B alloy are characterized, and their effects on plastic deformation are investigated. The study reveals that some {110} recrystallized grains preferentially formed at {111} shear bands as the main nucleation sites at lower rolling temperature, whereas more {111} recrystallized grains occur at 680 °C rolling temperature. The content and size of B2 ordered phases increase with increasing deformation temperatures, meanwhile majority of superdislocations are changed into single dislocations, relieving the stress through cross‐slip. The plastic deformability of Fe–6.9Si–0.01B alloy improves by increasing deformation temperature is attributed to a contribution combining decrease in order degree and recrystallization softening with optimization of GBCD.

Texture and Magnetic Property of Fe-6.5 wt % Si Steel Strip with Cu-Rich Particles Modification

“…This hot brittleness seriously hinders the development and application of Fe-6.5 wt % Si high-silicon steel. 8 The preparation of high-silicon steel materials by rapid solidification technology can effectively inhibit the formation of ordered phases (B2, DO 3 ) 6,9,10 and greatly improve the mechanical properties of high-silicon steel. Therefore, the rapid solidification and strip casting technology 11,12 was used in the experiment to prepare high silicon strip materials with remarkable magnetic and mechanical properties, which also has significant reference value for other functional materials.…”

“…Because high-silicon content (Si content ≥4.5 wt %) steel is prone to cracks during the traditional rolling process, ,, it frequently necessitates repeated rolling heat treatment operations, resulting in high cost of high-silicon steel produced with traditional casting-rolling processes. This hot brittleness seriously hinders the development and application of Fe-6.5 wt % Si high-silicon steel . The preparation of high-silicon steel materials by rapid solidification technology can effectively inhibit the formation of ordered phases (B2, DO 3 ) ,, and greatly improve the mechanical properties of high-silicon steel.…”