The analysis of internal strains measured by neutron diffraction in Al/SiC metal matrix composites

Journal Article · Tue Sep 01 00:00:00 EDT 1992 · Acta Metallurgica et Materialia; (United States)

DOI:https://doi.org/10.1016/0956-7151(92)90155-8· OSTI ID:6906142

Allen, A J; Bourke, M A.M.; Dawes, S; Hutchings, M T; Withers, P J ^[1]

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1. Harwell Laboratory, Didcot (United Kingdom) Cambridge, University, (United Kingdom)

Neutron diffraction measurements of internal strain development during tensile loading are analyzed so as to deduce the extent and mechanisms of load transfer taking place between matrix and reinforcement. It is demonstrated that the observed lattice strains in Al/20 vol pct SiC whisker and particulate composites can be understood largely in terms of an elastic transfer of load arising from the higher stiffness of the reinforcing phase, however at loads approaching a conventional 0.2 percent yield stress, plastically induced stresses also become important. Furthermore, in the particulate composite there is clear evidence that stress relaxation mechanisms are also important. 17 refs.

• OSTI ID: 6906142
• Journal Information: Acta Metallurgica et Materialia; (United States), Journal Name: Acta Metallurgica et Materialia; (United States) Vol. 40:9; ISSN 0956-7151; ISSN AMATEB
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360603* -- Materials-- Properties
ALLOYS
ALUMINIUM ALLOYS
CARBIDES
CARBON COMPOUNDS
COHERENT SCATTERING
COMPOSITE MATERIALS
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CRYSTALS
DIFFRACTION
MATERIALS
MONOCRYSTALS
NEUTRON DIFFRACTION
RELAXATION
SCATTERING
SILICON CARBIDES
SILICON COMPOUNDS
STRESS ANALYSIS
STRESS RELAXATION
WHISKERS