Statistical analysis on static recrystallization texture evolution in cold-rolled AZ31 magnesium alloy sheet

Area of Science:

• Materials Science
• Metallurgy
• Materials Engineering

Background:

• Magnesium alloys like AZ31B are crucial for lightweight applications.
• Understanding texture evolution is key to optimizing mechanical properties.
• Thermomechanical processing significantly influences alloy microstructure and texture.

Purpose of the Study:

• To analyze the global and local texture evolution of AZ31B-H24 magnesium alloy.
• To investigate the impact of cold rolling and annealing on grain structure and texture.
• To correlate microstructure changes with texture development during annealing.

Main Methods:

• Cold rolling and annealing of cast AZ31B-H24 magnesium alloy.
• X-ray diffractometry for global texture analysis.
• Electron backscattered diffractometry for image-based microstructure and local texture analysis.

Main Results:

• Cold-rolled samples exhibited a split basal texture (±10-15° in the rolling direction).
• Recrystallized grains showed widely spread basal poles during nucleation.
• Grain growth during annealing resulted in a strong {0001} basal texture.

Conclusions:

• Annealing promotes recrystallization and texture development in rolled AZ31B magnesium alloy.
• The transition from deformed to recrystallized grains alters the texture significantly.
• Controlled annealing is essential for achieving desired basal texture in magnesium alloys.