An alpha-beta Ti alloy having improved mechanical and ballistic properties formed using a low-cost composition is disclosed. In one embodiment, the Ti alloy composition, in weight percent, is 4.2 to 5.4% aluminum, 2.5 to 3.5% vanadium, 0.5 to 0.7% iron, 0.15 to 0.19% oxygen and balance titanium. The exemplary Ti alloy exhibits a tensile yield strength of at least about 120,000 psi and an ultimate tensile strength of at least about 128,000 psi in both longitudinal and transverse directions, a reduction in area of at least about 43%, an elongation of at least about 12% and about a 0.430-inch-thick plate has a V.sub.50 ballistic limit of about 1936 fps. The Ti alloy may be manufactured using a combination of recycled and/or virgin materials, thereby providing a low-cost route to the formation of high-quality armor plate for use in military systems.

An alpha-beta Ti alloy having improved mechanical and ballistic properties formed using a low-cost composition is disclosed. In one embodiment, the Ti alloy composition, in weight percent, is 4.2 to 5.4% aluminum, 2.5 to 3.5% vanadium, 0.5 to 0.7% iron, 0.15 to 0.19% oxygen and balance titanium. The exemplary Ti alloy exhibits a tensile yield strength of at least about 120,000 psi and an ultimate tensile strength of at least about 128,000 psi in both longitudinal and transverse directions, a reduction in area of at least about 43%, an elongation of at least about 12% and about a 0.430-inch-thick plate has a V.sub.50 ballistic limit of about 1936 fps. The Ti alloy may be manufactured using a combination of recycled and/or virgin materials, thereby providing a low-cost route to the formation of high-quality armor plate for use in military systems.

A projectile resistant desk. The desk includes a desktop support having a receptacle and a removable desktop hingedly coupled to a slip rod; wherein the slip rod substantially corresponds to the receptacle and allows the desktop to be removably secured to the desktop support. The projectile resistant desk is suited for frame styled or storage styled supports. The desktop can be made of a variety of materials including bullet-resistant glass, polycarbonates, polyurethane, fiberglass and resins and can include one or more handles on its underside. The desk can further include a projectile resistant leg shield.

A projectile resistant desk. The desk includes a desktop support having a receptacle and a removable desktop hingedly coupled to a slip rod; wherein the slip rod substantially corresponds to the receptacle and allows the desktop to be removably secured to the desktop support. The projectile resistant desk is suited for frame styled or storage styled supports. The desktop can be made of a variety of materials including bullet-resistant glass, polycarbonates, polyurethane, fiberglass and resins and can include one or more handles on its underside. The desk can further include a projectile resistant leg shield.

An interleaving hexagonal tile (AHT) is provided for incorporation onto a liner in an array for a personnel armor clothing article. The AHT includes a hexagonally-symmetric solid object composed of a homogeneous material. The object includes a geometry that has obverse and reverse planar surfaces parallel to each other. Each planar surface has triangularly disposed terminals. First and second triple sets of oblique surfaces are disposed between the obverse and reverse planar surfaces. A plurality of facets is disposed substantially perpendicular to the planar surfaces. The facets connect between edges of the planar surfaces and adjacent edges of the oblique surfaces. The first and second triple sets of oblique surfaces are disposed to alternate with each other.

Injector assemblies and methods to repair concrete barriers, in particular ballistic concrete barriers used for training facilities used for training with live ammunition. Replacement material is loaded into the injector body and a set of one or more valves are used to allow air pressure to move the replacement material into a vented void in the ballistic panel to fill the void.

An aspect of the present disclosure is directed to low-alloy steels exhibiting high hardness and an advantageous level of multi-hit ballistic resistance with low or no crack propagation imparting a level of ballistic performance suitable for military armor applications. Various embodiments of the steels according to the present disclosure have hardness in excess of 550 BHN and demonstrate a high level of ballistic penetration resistance relative to conventional military specifications.

An aspect of the present disclosure is directed to low-alloy steels exhibiting high hardness and an advantageous level of multi-hit ballistic resistance with low or no crack propagation imparting a level of ballistic performance suitable for military armor applications. Various embodiments of the steels according to the present disclosure have hardness in excess of 550 BHN and demonstrate a high level of ballistic penetration resistance relative to conventional military specifications.

The present invention provides an energy absorber for a blast barrier system comprising a substantially tubular member extending longitudinally along an axis from a first end portion to a second end portion, each of the first end portion and the second end portion having a substantially similar geometric, profile, wherein the energy absorber collapses under a predetermined load when compressed by a residual blast force. The energy absorber of the present invention may help minimize damage to people and structures by further dissipating force from a blast in a blast barrier system.

A ballistic cover system that embodies a novel ballistic blanket and method for containing energy and fragmentation projected during a supercharged engine explosion is provided. The ballistic cover system enables the ballistic blanket to react to the engine explosion, positioning itself from a racing configuration to a ballistic configuration. A plurality of restraint straps are attached to the supercharger, keeping it along a controlled path during the explosion. Moreover, two of the restraint straps act as mounting rails that the ballistic blanket rides along when reactively moving from the racing configuration to the ballistic configuration.