Accession Number:

ADA455628

Title:

Lightweight Multifunctional Linear Cellular Alloy Ballistic Structures

Descriptive Note:

Final rept. 1 Aug-31 Dec 2005

Corporate Author:

STRUCTURED ALLOYS INC MARIETTA GA

Personal Author(s):

• Cochran, Joe K.

Report Date:

2006-04-26

Pagination or Media Count:

16.0

Abstract:

The objective of this effort was to develop the techniques for fabricating a multifunctional lightweight structure that could be used as armor for mobile vehicles such as personnel carriers. These fabrication techniques are scalable to manufacturing production levels. For this program, square cell LCA honeycomb with both maraging steel and super invar compositions were fabricated using SAIs patented technology to have cross sections of one inch square. These honeycombs have 5 cellsside or 25 cellssq in and all walls have the same thickness. For these extrusions, cell size was held constant and varying the wall thickness form 0.10 to 0.20 inches varied the relative density from 10 to 20. Bulk densities were approx. 1, 1.3, and 1.6 gcc. Samples were supplied to Robert Frey and John Runyeon, ARL, Aberdeen, for evaluation by high strain rate experimental techniques to test the effect of macrostructure density on energy absorption to optimize the topology of these systems for maximum structural response for specific boundary loading conditions. In this delivery were a total of 67 samples with a length of five inches and 46 samples with a length of one inch, all of which are pictured in the results section.

Descriptors:

• *ARMOR
• *HIGH STRENGTH ALLOYS
• THICKNESS
• CELLS
• STRAIN RATE
• TOPOLOGY
• WALLS
• SINTERING
• ENERGY ABSORBERS
• SHOCK MITIGATION
• MARAGING STEELS
• HONEYCOMB STRUCTURES
• ARMORED PERSONNEL CARRIERS
• STRUCTURAL RESPONSE
• IMPACT STRENGTH
• FIRING TESTS(ORDNANCE)
• FABRICATION
• EXTRUSION

Subject Categories:

• Properties of Metals and Alloys
• Fabrication Metallurgy
• Armor
• Ballistics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE