Mechanical properties of metal-intermetallic microlaminate composites

Book · Mon Dec 30 23:00:00 EST 1996

OSTI ID:490763

Heathcote, J; Odette, G R; Lucas, G E ^[1]; Rowe, R G ^[2]

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1. Univ. of California, Santa Barbara, CA (United States)
2. GE CRD, Schenectady, NY (United States)

Tensile strengths, static and dynamic fracture toughness, and fatigue crack propagation were measured for different combinations of Nb metal-intermetallic microlaminate composites. Metal layer bridging produced toughening by factors of 2 to 5 under static conditions. Dynamic testing reduced the toughness significantly. Fatigue crack propagation rates were comparable to data for pure Nb. A key composite property, the stress-displacement function {sigma}(u) of the constrained metal layers, was evaluated by several techniques and used in bridging-crack stability analysis to predict tensile strengths in agreement with experimental values. The results provide guidelines for improving microlaminate performance.

• Sponsoring Organization: Department of the Air Force, Washington, DC (United States)
• OSTI ID: 490763
• Report Number(s): CONF-960401--; ISBN 1-55899-337-1
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
CHROMIUM ALLOYS
COMPOSITE MATERIALS
CRACK PROPAGATION
EXPERIMENTAL DATA
FATIGUE
FRACTOGRAPHY
FRACTURE MECHANICS
FRACTURE PROPERTIES
INTERMETALLIC COMPOUNDS
MECHANICAL PROPERTIES
NIOBIUM
NIOBIUM ALLOYS
TENSILE PROPERTIES
TITANIUM ALLOYS