Accession Number:

ADA235863

Title:

XD(TM) Reinforced Beryllium-Based Composites

Descriptive Note:

Final technical rept. Mar 1985-Aug 1990

Corporate Author:

MARTIN MARIETTA ELECTRONICS AND MISSILES GROUP ORLANDO FL MISSILE SYSTEMS

Personal Author(s):

• Meyerer, Wendell
• Bopp, Al
• Grensing, Fritz

Report Date:

1990-12-01

Pagination or Media Count:

84.0

Abstract:

The objective of this program is to demonstrate the feasibility of using fine particle inoculants called dispersoids to produce fine-grained beryllium castings. Such castings would be much less expensive than beryllium- based materials produced by conventional powder metallurgy. Beryllium is an attractive candidate for lightweight aerospace applications. It has higher melting temperature and greater tensile strength than either magnesium or aluminum, a higher strength-to-weight ratio than either metal, and a lower thermal coefficient of expansion and higher specific heat. Its modulus of elasticity is four times that of aluminum. The low density and high modulus of beryllium and beryllium based intermetallics make them ideal materials for aerospace applications requiring high dimensional stability and low weight.

Descriptors:

• *BERYLLIUM
• *CASTINGS
• *GRAIN GROWTH
• TENSILE STRENGTH
• STABILITY
• SIZES(DIMENSIONS)
• DISPERSANTS
• MATERIALS
• MODULUS OF ELASTICITY
• METAL MATRIX COMPOSITES
• MATRIX MATERIALS
• AEROSPACE SYSTEMS
• HIGH STRENGTH
• ALUMINUM
• COEFFICIENTS
• LIGHTWEIGHT
• LOW DENSITY
• POWDER METALLURGY
• STRENGTH WEIGHT RATIO
• MELTING POINT
• SPECIFIC HEAT
• DISPERSIONS
• PARTICLE SIZE
• FINE GRAINED MATERIALS
• THERMAL PROPERTIES
• MAGNESIUM

Subject Categories:

• Laminates and Composite Materials
• Properties of Metals and Alloys
• Fabrication Metallurgy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE