Characterization and Calculation of the Dynamic Recrystallization Texture in Fe-3.0 Wt.% Si Alloy

Area of Science:

• Materials Science
• Metallurgy
• Physical Metallurgy

Background:

• High-temperature deformation significantly impacts material properties.
• Understanding texture evolution is crucial for predicting material behavior during hot working.
• Dynamic recrystallization (DRX) is a key mechanism in hot deformation.

Purpose of the Study:

• To investigate the influence of initial texture on microstructure and texture development during high-temperature plane-strain compression of Fe-3.0 wt.% Si alloy.
• To establish a quantitative relationship for the critical Taylor factor dependence on instantaneous texture.
• To propose a model for dynamic recrystallization texture prediction.

Main Methods:

• High-temperature plane-strain compression tests were conducted on Fe-3.0 wt.% Si alloy.
• Temperatures ranged from 900 °C to 1150 °C, with strain rates from 5 s⁻¹ to 1 s⁻¹.
• Electron backscattered diffraction (EBSD) was used to analyze texture development and microstructure evolution.

Main Results:

• Dynamic recrystallization occurred via strain-induced boundary migration.
• Microstructure and texture component evolution varied significantly with the initial texture.
• A critical orientation boundary was identified, and its movement was linked to the initial texture.
• A quantitative relationship between the critical Taylor factor and instantaneous texture was established.

Conclusions:

• The initial texture plays a critical role in dynamic recrystallization and texture evolution during hot deformation of Fe-3.0 wt.% Si alloy.
• A novel model incorporating oriented nucleation probability and a variable critical Taylor factor can describe DRX texture.
• This research enhances the accuracy of hot deformation texture prediction models based on strain-induced boundary migration.