Weldability of 2219-T851 and 2519-T87 Aluminum Armor Alloys for Use in Army Vehicle Systems
ARMY LAB COMMAND WATERTOWN MA MATERIALTECHNOLOGY LAB
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A preliminary study of the weldability of 2219-T851 and 2519-T87 aluminum armor alloys was undertaken to determine the feasibility for their use in U.S. Army vehicle systems. Weldability was assessed in terms of weldment tensile strength, fatigue endurance limit, resistance to stress corrosion cracking, and ballistic shock integrity. Results show that 2519-T87 is a candidate material for replacing 5083-H131 or 7039-T64 due to high tensile strength and resistance to stress corrosion cracking. The initial weldments failed ballistic qualification to MIL-STD-1946, but the results were encouraging. It is felt that, with recent joint design changes and alterations to the critical velocity requirements in MIL-STD-1946, 2519-T87 weldments can exhibit sufficient ballistic integrity.
- Fabrication Metallurgy
- Combat Vehicles