On the flow behavior of constrained ductile phases

Journal Article · Mon Feb 01 00:00:00 EST 1993 · Metallurgical Transactions, A (Physical Metallurgy and Materials Science); (United States)

DOI:https://doi.org/10.1007/BF02657328· OSTI ID:6133393

Xiao, L; Abbaschian, R ^[1]

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1. Univ. of Florida, Gainesville (United States)

Effects of the matrix/reinforcement interface and the mechanical properties and size of the ductile reinforcement on the flow behavior of the constrained ductile reinforcement have been evaluated using a tensile test on a single Nb lamina imbedded in MoSi[sub 2] matrix. It was found that work of rupture of the ductile reinforcement increased with size of the ductile reinforcement and with decreasing fracture energy of the matrix/reinforcement interface. It was also found that the work of rupture normalized by size and yield strength of the reinforcement was dependent on the interfacial properties and size of the reinforcement. Based on the observation, an analytical model is developed which gives insight into the influence on the stress-displacement curve of yield strength, work hardening, fracture energy of matrix/reinforcement interface, and size of the reinforcement. A characteristic decohesion length, which is a function of size of the reinforcement, has been identified by the model and related to the measured decohesion length. The results allow the extrapolation of the work of rupture measured from the large size of constrained ductile phases to the small size of the ductile phases. As the reinforcements used in composites are usually smaller in size than those tested in such tensile tests, the extrapolation of the work of rupture allows the contribution of ductile reinforcements to the toughness of a brittle matrix composite to be calculated.

• OSTI ID: 6133393
• Journal Information: Metallurgical Transactions, A (Physical Metallurgy and Materials Science); (United States), Vol. 24:2; ISSN 0360-2133
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COMPOSITE MATERIALS
DUCTILITY
MOLYBDENUM SILICIDES
NIOBIUM
FRACTURE PROPERTIES
HARDENING
INTERFACES
MATHEMATICAL MODELS
MATRIX MATERIALS
MECHANICAL PROPERTIES
REINFORCED MATERIALS
RUPTURES
YIELD STRENGTH
ELEMENTS
FAILURES
MATERIALS
METALS
MOLYBDENUM COMPOUNDS
REFRACTORY METAL COMPOUNDS
SILICIDES
SILICON COMPOUNDS
TENSILE PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
360603* - Materials- Properties