Characterization of metal matrix composites. Final report, 15 November 1988-31 March 1993

Technical Report · Tue Nov 01 00:00:00 EST 1994

OSTI ID:6565506

Daniel, I M; Chun, H J; Karalekas, D

Experimental methods were developed, adapted, and applied to the characterization of a metal matrix composite system, namely, silicon carbide/aluminim (SCS-2/6061 Al), and its constituents. The silicon carbide fiber was characterized by determining its modulus, strength, and coefficient of thermal expansion. The aluminum matrix was characterized thermomechanically up to 399 C (750 F) at two strain rates. The unidirectional SiC/Al composite was characterized mechanically under longitudinal, transverse, and in-plane shear loading up to 399 C (750 F). Isothermal and non-isothermal creep behavior was also measured. The applicability of a proposed set of multifactor thermoviscoplastic nonlinear constitutive relations and a computer code was investigated. Agreement between predictions and experimental results was shown in a few cases. The elastoplastic thermomechanical behavior of the composite was also described by a number of new analytical models developed or adapted for the material system studied. These models include the rule of mixtures, composite cylinder model with various thermoelastoplastic analyses and a model based on average field theory. In most cases satisfactory agreement was demonstrated between analytical predictions and experimental results for the cases of stress-strain behavior and thermal deformation behavior at different temperatures. In addition, some models yielded detailed three-dimensional stress distributions in the constituents within the composite.

• Research Organization: Northwestern Univ., Evanston, IL (United States)
• OSTI ID: 6565506
• Report Number(s): N-95-18940; NASA-CR-195381; E-9121; NAS-1.26:195381; CNN: NAG3-950; RTOP 505-63-5B
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
ELASTICITY
THERMODYNAMICS
MATRIX MATERIALS
SILICON CARBIDES
DEFORMATION
FIBERS
PROGRESS REPORT
SHEAR PROPERTIES
STRESSES
THERMAL EXPANSION
ALLOYS
CARBIDES
CARBON COMPOUNDS
DOCUMENT TYPES
EXPANSION
MATERIALS
MECHANICAL PROPERTIES
SILICON COMPOUNDS
TENSILE PROPERTIES
360603* - Materials- Properties
360606 - Other Materials- Physical Properties- (1992-)