2008 Volume 49 Issue 1 Pages 38-40
Conventional uniaxial compression test, designed to yield an effective strain of ∼1, was carried out to understand the deformation mechanism of severely deformed commercial pure titanium at various temperatures. TEM analysis showed that only [10\\bar11] twins accompanied with ⟨a⟩ slip dislocations were activated on non-basal planes in samples compressed at 573 and 623 K. In particular, the whole area of the sample compressed at 623 K were covered with [10\\bar11] twin bands with a width of 200 nm. However, ⟨a+c⟩ slip instead of [10\\bar11] twinning were found in samples compressed at 673 and 823 K. This indicates that [10\\bar11] twinning plays an important role in accommodating severe plastic strain before the activation temperature of ⟨a+c⟩ slip.
