Damage Assessment in TiB2 Ceramic Armor Targets

Report No. ARL-TR-2607
Authors: Nevin L. Rupert, William H. Green, Joseph M. Wells, and Kevin J. Doherty
Date/Pages: November 2001; 63 pages
Abstract: The interaction between long rods and ceramics is only partially understood; however, this understanding is essential in the design of improved performance of impact-resistant materials and armor system design applications. The current work takes a preliminary look into the modern mythology surrounding the formation of radial cracking in ceramics during ballistic penetration. Tests were conducted using a 32-g tungsten alloy laboratory penetrator with a length to diameter ratio (L/D) = 20 at a nominal impact velocity of 1,600 m/s. Testing evaluated both prestressed and unstressed titanium diboride (TiB2) ceramic tiles. Evaluation of the damage included microstructural analysis using a scanning electron microscope (SEM) with a Robinson backscatter detector for surface structure, the x-ray computed tomography (CT) nondestructive technique to completely scan the interior of each disk, and limited analytical modeling of the stress state.
Distribution: Approved for public release
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Last Update / Reviewed: November 1, 2001