Abstract
New high-strength aluminum alloys of YKK Corporation, GIGAS-30 and
GIGAS-51 were studied in plane impact experiments with impact velocities
ranged from 100 to 500 m/sec. The projectiles with 2-mm flat impactors
were accelerated in 25-mm powder (SWRC) and 25-mm pneumatic (BGU) guns.
In parallel the same set of experiments was performed on commercial
high-strength aluminum alloy 7075-T6. Both the samples and the impactors
were made of the rods of the same material. The free surface velocity of
the samples was measured by the VISARs with velocity constants 130 and
97 m/sec per fringe. The dynamic response of GIGAS-30 alloy is close to
that of commercial alloy 7075-T6: both have the HEL of about 0.9 GPa and
the velocity pull-back corresponding the spall strength of about 1.8
GPa, increasing slightly with the increase of the impact velocity. The
HEL of GIGAS-51 alloy was found about 0.6 GPa. The spall strength of
GIGAS-51 alloy was found about 1.5 GPa with the trend to increase with
the increase of the impact strength. 1-D numerical simulations of the
impact response of the alloys allow to explain the differences and the
similarities in the behavior of these materials.
| Original language | English |
|---|---|
| Pages (from-to) | 497-500 |
| Journal | AIP Conference Proceedings |
| Volume | 505 |
| Issue number | 1 |
| DOIs | |
| State | Published - 1 Apr 2000 |
Keywords
- Mechanical testing impact tests static and dynamic loads
- High-pressure and shock wave effects in solids and liquids
- Deformation and plasticity