S.V. Prikhodko, O.M. Ivasishin, P.E. Markovsky, D.G. Savvakin, O.O. Stasiuk
University of California, Los Angeles, United States
Keywords: Ti alloy, metal matrix composite, layered structure, anti-ballistic protectionTitanium alloys are unique high-strength and light-weight structural materials that can be thermally hardened to the level comparable to steels and their analogous but being almost twice as light. The high mass efficiency, high corrosion resistance and non-magnetic properties make titanium alloys superior to steels in the array of applications, including the variety of anti-ballistic armor. The high cost is the only drawback for the wide use of titanium for armor. We propose use of blended elemental powder metallurgy as cost-efficient fabrication technology that excludes pricey cast and wrought processing. Besides suggested approach use low-cost hydrogenated titanium powder instead of conventionally used high-cost titanium metal powder. Anti-ballistic properties of sintered materials are achieved by formation of the structure combining high hardness at the front facing armor surface and ductile core. We choose to combine layers of Ti-6Al-4V (wt.%) alloy (Ti-64), which provide sufficient ductility, along with metal matrix composites (MMC) on a Ti-64 base reinforced with TiC or TiB particles for the high hardness layers. Such layered structure is a key component for functionality and durability of armor materials. Our results show superior anti-ballistic performance of the armor plates fabricated by suggested technology over currently used Ti-64 alloy armor.