Abstract
The dynamic behavior of pure titanium was studied in planar impact
experiments performed with 25 mm light-gas gun, at impact velocities of
150-550 m/sec. The sample’s free surface velocity was monitored by
VISAR. Softly recovered samples were characterized utilizing XRD and
optical, SEM and TEM microscopy. Metallographic examination of the cross
section areas of the impacted samples revealed impact-oriented twin grid
with significantly smaller twin concentration in the close vicinity of
the spall plane. TEM studies revealed dense dislocation areas and twins
in the samples, with profound micro twins and ordered dislocations cell
structure near the spall plane. The results allow to estimation the
relative contribution of dislocation and twinning mechanisms in
shock-induced plastic deformation of titanium. The difference in the
morphology of the area near the spall plane, in contrast to the rest of
the sample, implies some stress reversibility in the behavior of both
twins and un-arrested dislocations.
| Original language | English |
|---|---|
| Title of host publication | American Physical Society, Shock Compression of Condensed Matter |
| State | Published - 1 Jun 2001 |