2001 Volume 42 Issue 11 Pages 2440-2445
The dynamic restoration process of 99.99 mass% purity aluminum has been investigated using a 〈111〉 oriented single crystal. The deformation was carried out by constant compression speed testing (at an initial strain rate of 1.67×10−3 s−1) at temperatures ranging from 373 to 853 K . True stress-strain curves showed gradual hardening typical of 99.99 mass% grade aluminum. The microstructure after the testing contained newly generated high angle boundaries. Continuous dynamic recrystallization was found to take place even at 373 K . High angle grain boundaries appeared at a strain of 0.28 at 453 K, while at 0.20 at 613 K . However, grains where all the surrounding boundaries have high angle boundaries were very few.