Studies on the Recrystallization of Magnesium and Its Alloys (Report 3) Recrystallized Grains Annealed at Heigher Temperature after Severe Deformation

Abstract

The orientation and grain size of pure Mg crystals which were deformed at the degrees of 20∼60% and annealed at 640° for 1∼4 hours were examined by investigating micro-scopic structure and by X-ray analysis. The results were as follows:
1. Recrystallized grain grew abnormally at the working degree of about 45∼55%.
2. The inclination of hexagonal axis [0001] to the direction of working was from 0° to about 30° after pressing or forging.
3. For the samples annealed at 640°, the inclination of [0001] to the direction of working was from 0° to about 50° and for the samples grown abnormally, it was from 15° to 70°.
4. The inclination increased a few minutes after heating at 640° and aftter 1 hour it was kept at about 15∼70° to 4 hours.