MICROSTRUCTURAL AND FRACTOGRAPHIC STUDIES OF BORON CARBIDE SUBJECTED TO BALLISTIC IMPACT AND STATIC FLEXURAL LOADING
ARMY MATERIALS AND MECHANICS RESEARCH CENTER WATERTOWN MA
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Microstructural and fractographic studies were conducted on hot- pressed boron carbide ceramics subjected to ballistic impact by caliber .30 AP M2 projectiles and static flexural loading. A variety of observational techniques were employed, including conventional metallographic and low-power optical examinations, electron microprobe analysis, scanning electron microscopy, and replication electron microscopy. Results suggest that macroscopic topography of fracture-exposed surfaces is indicative of stress states occurring during the fracture event whereas microscopic topography is determined by microstructural constituents, particularly secondary phases, pores, and grain boundaries.
- Ceramics, Refractories and Glass