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Evaluation of Titanium-5Al-5Mo-5V-3Cr (Ti-5553) Alloy against Fragment and Armor-Piercing Projectiles
Progress rept. 8 Jan 2007-8 Jun 2009
ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD WEAPONS AND MATERIALS RESEARCH DIRECTORATE
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Ballistic tests were carried out on the relatively new titanium alloy Ti-5A1-5V-5Mo-3Cr Ti-5553, which was subjected to two heat treatment conditions. The two heat treatments provided high-strength plates which were solution treated and aged STA and high toughness plates that were beta-annealed, slow cooled and aged BASCA. The 13.9-mm-thick plates were evaluated for V50 using 0.50-cal. FSP and 0.30-cal. AP M2 projectiles. The results were benchmarked against MIL-DTL- 46077F and MIL-A-46077 D for weldable titanium alloy armor plate Ti-6Al-4V. The BASCA plates exceeded the requirement for the 0.30-cal. AP M2 by 3.2 but fell short of the Ti-6A1-4V performance against the 0.50-cal. FSP projectiles by 11.3. The STA plates exceeded the Ti-6A1-4V mil-spec requirement by 8.7 and 11.7 for the 0.30-cal. AP M2 and 0.50-cal. FSP projectiles, respectively.
APPROVED FOR PUBLIC RELEASE