Texture Evolution in Si‐Alloyed Ultra Low‐Carbon Steels after Severe Plastic Deformation

Abstract

Conventional thermomechanical processing of low‐carbon steels leads to a characteristic texture dominated by a strong <111>//ND fiber after recrystallization. The latter texture is beneficial for certain applications, such as deep drawing, while it is detrimental for others, including magnetic applications. With regard to magnetic applications, there is an ongoing effort to improve the final texture in ferromagnetic materials such as Fe–Si alloys used in transformers and electrical devices. Since the <100> directions are the axes of easy magnetization, it is essential to produce a texture that maximizes the volume fraction of grains with a <100> crystal direction in the flux direction. Bearing in mind that no phase transformation occurs during the processing of Fe–3%Si, plastic deformation and recrystallization are the prime controlling instruments to generate an appropriate microstructure and texture. In this study, the potential of severe plastic rolling deformation is considered. It is shown that, by strongly increasing the cold‐rolling reduction, the volume fraction of the unfavourable {111} component is significantly decreased and the specific {113}<136> component arises after annealing.

Through process texture evolution and magnetic properties of high Si non-oriented electrical steels

“…The origin and evolution of the α*-fibre during recrystallization are not well understood. The results of the present study are consistent with the literature sources [36][37][38] …”

Development of Recrystallization Texture in Severely Cold-rolled Pure Iron

“…Miho TOMITA, 1,4) * Tooru INAGUMA, 2) Hiroaki SAKAMOTO 2) and Kohsaku USHIODA 3,4) the texture changes took place by selective growth during recrystallization of a Ti-bearing interstitial free (IF) steel.…”

Microstructure and texture evolution during the ultra grain refinement of the Armco iron deformed by accumulative roll bonding (ARB)

“…8b). This {311}/136S component is characteristic of the recrystallized state of a highly cold-rolled BCC materials [22][23][24] due to an oriented nucleation from the strained rotated cube component that reveals internal orientation gradients at the deformed state.…”

“…After 7 ARB cycles (e 7 ¼5.8, Fig. 8f), the texture is mainly composed of fibers /001SJND, /111SJND and /110SJRD with a strengthening of the rotated Cube and the {111}/110S components which is actually particularly interesting for magnetic applications [23]. Let us note that after hot rolling in the ferrite region of an ultra-low carbon steel, Ré glé et al [25] have shown also that the texture is characterized by a partial a fiber from {100}/110S to {111}/110S, with a strengthening of these two components, a complete g fiber and a Goss component which is not found in the present work.…”