Interface diffusion-induced creep and stress relaxation in unidirectional metal matrix composites under biaxial loading

Li, Yinfeng; Li, Shu; Li, Zhonghua

doi:10.1016/j.mechmat.2014.05.003

Cited by 12 publications

(2 citation statements)

References 28 publications

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“…This provides additional strain of the composite material above and beyond that due to matrix flow. Such phenomena have been modelled employing continuum plasticity with the matrix considered as a power-law creeping solid; see for example Sofronis and McMeeking (1994) and more recently by Li et al (2014). These continuum models are anticipated to be adequate if geometric length scales (e.g.…”

Section: Introductionmentioning

confidence: 99%

Interfacial diffusion in high-temperature deformation of composites: A discrete dislocation plasticity investigation

Shishvan

Pollock

McMeeking

et al. 2017

Journal of the Mechanics and Physics of Solids

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We present a discrete dislocation plasticity (DDP) framework to analyse the high temperature deformation of multiphase materials (composites) comprising a matrix and inclusions. Deformation of the phases is by climb-assisted glide of the dislocations while the particles can also deform due to stress-driven interfacial diffusion. The general framework is used to analyse the uniaxial tensile deformation of a composite comprising elastic particles with dislocation plasticity only present in the matrix phase. When dislocation motion is restricted to only glide within the matrix a strong size effect of the composite strength is predicted with the strength increasing with decreasing unit cell size due to dislocations forming pileups against the matrix/particle interface. Interfacial diffusion decreases the composite strength as it enhances the elongation of the elastic particles along the loading direction. When dislocation motion occurs by climb-assisted glide within the matrix the size effect of the strength is reduced as dislocations no longer arrange high energy pileup structures but rather form lower energy dislocation cell networks. While interfacial diffusion again reduces the composite strength, in contrast to continuum plasticity predictions, the elongation of the particles is almost independent of the interfacial diffusion constant. Rather, in DDP the reduction in composite strength due to interfacial diffusion is a result of changes in the dislocation structures within the matrix and the associated enhanced dislocation climb rates in the matrix.

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Section: Introductionmentioning

confidence: 99%

Interfacial diffusion in high-temperature deformation of composites: A discrete dislocation plasticity investigation

Shishvan

Pollock

McMeeking

et al. 2017

Journal of the Mechanics and Physics of Solids

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show abstract

“…A large amount of work has been conducted recently in an effort to characterize the mechanical behaviour of particle reinforced MMCs. Not only new production technologies have been developed [6][7][8][9] but also analytical and numerical modelling has been done [10][11][12][13][14][15][16]. The latest provides an effective and relatively cheap and fast means of predicting effective properties of the composite (e.g.…”

Section: Introductionmentioning

confidence: 99%

The measurement of the adhesion force between ceramic particles and metal matrix in ceramic reinforced-metal matrix composites

Jarząbek

Chmielewski

Wojciechowski

2015

Composites Part A: Applied Science and Manufacturing

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Interface diffusion-induced creep in metal matrix particulate composites under triaxial loading

Sun

Ren

et al. 2017

Acta Mech

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Interface diffusion-induced creep and stress relaxation in unidirectional metal matrix composites under biaxial loading

Cited by 12 publications

References 28 publications

Interfacial diffusion in high-temperature deformation of composites: A discrete dislocation plasticity investigation

Interfacial diffusion in high-temperature deformation of composites: A discrete dislocation plasticity investigation

The measurement of the adhesion force between ceramic particles and metal matrix in ceramic reinforced-metal matrix composites

Interface diffusion-induced creep in metal matrix particulate composites under triaxial loading

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