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Accession number;01A0468316
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| Title;Ballistic performance of purity titanium and titanium alloy plates. |
| Author;
USUI TOSHICHIKA
(Natl. Def. Acad.)
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Journal Title;Journal of High Pressure Institute of Japan
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Journal Code:S0913A
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ISSN:0387-0154
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VOL.39;NO.2;PAGE.89-97(2001)
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| Figure&Table&Reference;FIG.8, TBL.2, REF.10 |
| Pub. Country;Japan |
| Language;Japanese |
| Abstract;Ballistic impact experiments were conducted on thin and middle purity titanium and Ti-6pct Al-4pctV alloy plates and other titanium alloy plates using projectiles with 5.56mm and 7.62mm diameter. The impact velocities were between 350m/s and 500m/s for the thin target plates, and were between 900m/s and 950m/s for middle target plates. The micro-structural damage mechanisms as adiabatic shear band (ASB) formation and dynamic fracture associated with impact were observed by optical microscope. Especially, observation of the fractured regions in annealed Ti-6Al-4V revealed the long crack connected ASB-cracks and bending crack at the bulging region, but as this long crack of Ti-6Al-4V did not find out in all other target plates. Ballistic results showed that both of strength and ductility are needed to increase the ballistic performance under high-strain-rate impact for thin target plates. It also showed high 0.2% proof stress (.SIGMA.0.2) is needed to act as a resistance against projectile, and the considerations to depress an influence of the adiabatic shear band is also needed to degrease the formation of cracks and voids in the impact fractured region for middle target plates. (author abst.) |
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