RECOVERY AND RECRYSTALLIZATION OF RAPIDLY SOLIDIFIED MG RIBBONS

Microcrystalline ribbons of commercially pure Mg were prepared by melt spinning. Their good thermal stability during isochronal annealing fr om room temperature up to 300 degrees C was revealed by means of elect rical resistance measurements, microhardness measurements, light micro scopy, and positron annihilation spectroscopy. The rolling of rapidly solidified ribbons at room temperature makes the stability of their mi crostructure worse between room temperature and 300 degrees C due to t he onset of recovery, primary recrystallization, and grain growth.