The application of the eshelby method of internal stress determination to short fibre metal matrix composites

Withers, Philip J.; Stobbs, W. M.; Pedersen, O.B.

doi:10.1016/0001-6160(89)90341-6

Cited by 379 publications

(105 citation statements)

References 39 publications

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“…In metal matrix composites (MMCs) additionally load transfer to ceramic inclusions in the matrix can increase the strength of the alloy (see e.g. [1,2]). Apart from this direct effect the presence of ceramic inclusions will also influence the precipitation in the matrix [1,3,4] and thus influence strengthening in an indirect way.…”

Section: Aimsmentioning

confidence: 99%

Microstrucure and strengthening of Al–Li–Cu–Mg alloys and MMCs: I. Analysis and Modelling of Microstructural changes

et al. 1999

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A complete and detailed analysis of the microstructural development during ageing in an 8090 (Al-2.3Li-1.2Cu-1Mg-0.1Zr) alloy, an 8090/20wt%SiC p MMC, an Al-1.5Li-Cu-Mg MMC and an Al-Cu-Mg MMC (all with similar Cu and Mg contents) has been performed. Volume fractions of all precipitates relevant for precipitation strengthening of the alloys (δ' phase, S' phase and GPB zones) have been determined using a recently derived method based on differential scanning calorimetry (DSC). The volume fractions have subsequently been successfully fitted using a novel model for transformation kinetics. The sizes of these precipitates have been analysed using newly derived expressions consistent with the latter model. As a result of dislocation generation around misfitting SiC particles the volume fractions of both GPB zones and S' phase depend strongly on the presence of these particles. Also the amount of Li present in the alloys influences the volume fractions of the phases significantly. The sizes of S' are similar for the four alloys. Introduction AimsMonolithic Al-based alloys for structural applications are generally strengthened by 4 basic mechanisms: precipitation strengthening, solution strengthening, grain and subgrain strengthening and strengthening by dislocations. The first two mechanisms depend strongly on composition of the alloy and on heat treatment and are generally employed in a metastable state, whilst the latter two mechanisms depend mostly on thermo-mechanical processing routes. In metal matrix composites (MMCs) additionally load transfer to ceramic inclusions in the matrix can increase the strength of the alloy (see e.g. [1,2]). Apart from this direct effect the presence of ceramic inclusions will also influence the precipitation in the matrix [1,3,4] and thus influence strengthening in an indirect way. The main aim of the present work and the companion paper [5] is to derive and validate a complete microstructure-property model for reinforced and unreinforced Al-Li-Cu-Mg type alloys and link this model with a novel model for the kinetics of microstructure development.

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Section: Aimsmentioning

confidence: 99%

Microstrucure and strengthening of Al–Li–Cu–Mg alloys and MMCs: I. Analysis and Modelling of Microstructural changes

et al. 1999

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“…Lattice strain predictions of a self-consistent polycrystal deformation model [1,2] have been treated theoretically [3] but here the predictions are compared with experimentally determined lattice strains. Neutron diffraction provides an unique tool for in-situ non-destructive characterization of lattice strains in polycrystalline materials, and has been widely reported, [4][5][6][7][8]. For this study the advantage of using neutrons, rather than conventional X-rays, is the high penetration power, which allows bulk average determination of the hkl specific lattice strains.…”

Section: Introductionmentioning

confidence: 99%

Lattice strain evolution during uniaxial tensile loading of stainless steel

Clausen

Lorentzen

Bourke

et al. 1999

Materials Science and Engineering: A

275

134

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Applied and residual lattice strains were determined by neutron diffraction during a tensile test of a weakly textured austenitic stainless steel and were compared to the predictions of a self-consistent polycrystal deformation model. Parallel to the tensile axis the model predictions are generally within the resolution of the diffraction measurements, but perpendicular to the tensile axis discrepancies are noted. Discrepancies between model and measurements were greater for the residual lattice strains than during loading. It is postulated that this is because the model does not predict reverse plasticity during unload.

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“…It should be noted that by using a Tresca type criterion, Withers et al [6] obtained the same results.…”

Section: ---> Effect Of the Mean Matrix Stressesmentioning

confidence: 62%

“…Withers et a1 [6] showed that under certain (oversimplified) hypothesis, the following expression can be established:…”

Section: ---> Effect Of the Mean Matrix Stressesmentioning

confidence: 99%

Mechanical properties of aluminium-based metal matrix composites reinforced with α-alumina platelets

Massardier¹,

Fougères²,

Merle³

1993

J. Phys. IV France

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To cite this version:Véronique Massardier-Jourdan, R. Fougeres, P. Merle. Mechanical properties of aluminium-based metal matrix composites reinforced with α-alumina platelets. ABSTRACTThe tensile properties of an aluminium-based metal matrix composite reinforced with a-alumina platelets were investigated from an experimental and a theoretical point of view. An increase in Young modulus, 0,2% proof stress, flow stress and ultimate tensile strength was observed over the unreinforced metal. These improvements were obtained at the expense of the tensile ductility. The experimental results were analyzed using both a dislocation model and a continuum model based on an iterative Eshelby method.

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The application of the eshelby method of internal stress determination to short fibre metal matrix composites

Cited by 379 publications

References 39 publications

Microstrucure and strengthening of Al–Li–Cu–Mg alloys and MMCs: I. Analysis and Modelling of Microstructural changes

Microstrucure and strengthening of Al–Li–Cu–Mg alloys and MMCs: I. Analysis and Modelling of Microstructural changes

Lattice strain evolution during uniaxial tensile loading of stainless steel

Mechanical properties of aluminium-based metal matrix composites reinforced with α-alumina platelets

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