Expanding the Availability of Lightweight Aluminum Alloy Armor Plate Procured from Detailed Military Specifications

Doherty, Kevin J.; Squillacioti, Richard; Cheeseman, B. A.; Placzankis, Brian E.; Gallardy, Denver

doi:10.1007/978-3-319-48761-8_79

Cited by 5 publications

(1 citation statement)

References 2 publications

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“…Since as far back as the Vietnam War, weight-sensitive combat vehicles have sought ballistic protection using high strength aluminum alloys [1]. While there are a number of aluminum alloys qualified for use in military armor plate applications, the 5xxx series are particularly widespread.…”

Section: Introductionmentioning

confidence: 99%

Strength Degradation in AA5083 Armor Plate After Exposure to Elevated Temperatures

Kasen¹,

Tubbs²

2022

Journal of Engineering Materials and Technology

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The thermally-driven evolution of β-phase (Al3Mg2) and its impact on strength is explored for three different producers of aluminum alloy 5083-H131 used in armor applications. Specimens were exposed to 100°C air for periods of up to 30 days. Through a combination of optical microscopy and computational image analysis, the extent of matrix β and grain boundary β in the microstructure was assessed. Quasi-static tensile testing was also used to measure strength as a function of exposure time. It was found that a degradation in yield strength strongly correlates with the rapid emergence of matrix β-phase and not slowly evolving grain boundary β networks typical of a sensitized microstructure. The decrease in yield strength is attributed to the loss of the solid solution strengthening via matrix β-phase precipitation. This suggests that field exposure to solar radiation, ambient air, or engine/exhaust heat could lead to a loss in the level of ballistic protection afforded by the alloy even without a sensitized condition.

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Section: Introductionmentioning

confidence: 99%