Thermally and mechanically induced residual strains in Al-SiC composites

Povirk, G.L.; Stout, M.G.; Bourke, M.A.M.; Goldstone, J. A.; Lawson, A. C.; Lovato, Manuel L.; MacEwen, S.R.; Nutt, Steven; Needleman, A.

doi:10.1016/0956-7151(92)90158-b

Cited by 85 publications

(20 citation statements)

References 27 publications

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“…with u i prescribed according to (3), together with symmetry conditions along x = ±w. As described in [7], the deformation history is calculated in an incremental manner.…”

Section: Discrete Dislocation Plasticitymentioning

confidence: 99%

“…A key issue in these experiments is that the interpretation of diffraction profiles or small-angle scattering patterns in terms of dislocation densities requires a model. Various theories are available at the moment, some of which are based on idealized dislocation distributions, for example Wilkens [1] and Groma [2], while others are based on continuum theories of plastic deformation, for example Povirk et al [3]. Models for describing plasticity at length scales of interest for diffraction or small-angle scattering are in an early stage of development and have attracted considerable attention in recent years, although for very different reasons.…”

Section: Introductionmentioning

confidence: 99%

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Simulated small-angle scattering patterns for a plastically deformed model composite material

Shenoy

Cleveringa

Phillips

et al. 2000

Modelling Simul. Mater. Sci. Eng.

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Simulated small-angle scattering patterns for a plastically deformed model composite material Shenoy, V.B.; Cleveringa, H.H.M.; Phillips, R.; Giessen, E. van der; Needleman, A. Take-down policy If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim. Abstract. The small-angle scattering patterns predicted by discrete dislocation plasticity versus local and non-local continuum plasticity theory are compared in a model problem. The problem considered is a two-dimensional model composite with elastic reinforcements in a crystalline matrix subject to macroscopic shear. Only single slip is permitted in the matrix material. Emphasis is on the relationship between characteristics of the scattering patterns and the dislocation structures that can develop as a function of the composite morphology. The computed small-angle scattering patterns clearly distinguish between the different dislocation structures that arise for different composite morphologies. Many features of the small-angle scattering patterns are also reproduced by continuum slip plasticity theory, although the local features due to the discreteness of the individual dislocations are not. The non-local hardening description that gives the best fit with the overall stress-strain response is found to also give the best agreement between the non-local continuum and the discrete dislocation scattering patterns.

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“…with u i prescribed according to (3), together with symmetry conditions along x = ±w. As described in [7], the deformation history is calculated in an incremental manner.…”

Section: Discrete Dislocation Plasticitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Simulated small-angle scattering patterns for a plastically deformed model composite material

Shenoy

Cleveringa

Phillips

et al. 2000

Modelling Simul. Mater. Sci. Eng.

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“…Considering the macrostrain contribution, the SiC thermal-strain component appears to be zero in axial and tensile in radial direction. Although the latter was reported, 23 it is likely that the results are influenced by unreliable hydrostatic and radial macrostrain strain components. Table II also indicates that the shear-strain component e 13 is significant, which explains the '' splitting'' seen in Fig.…”

Section: ͑23͒mentioning

confidence: 79%

“…22 Some authors use different reference values in different directions, such as measured interplanar spacing of an unreinforced alloy parallel and perpendicular to the symmetry axis. 23 Tables I and II give strains relative to the unreinforced alloy filings, whose lattice parameter was determined as aϭ4.0524(2) Å. Conversely, the lattice parameters of the bulk unreinforced alloy were aϭ4.0478(4) Å in the radial direction ͑perpendicular to the specimen rod axis͒ and aϭ4.0549(3) Å in the axial direction ͑parallel to the specimen rod axis͒. This gives an additional compression component of Ϫ1.14ϫ10 Ϫ3 strain in the radial direction and a tension component of 0.62ϫ10 Ϫ3 strain in the axial direction of the bulk unreinforced alloy relative to the powder, which can be identified as a macrostrain caused by the extrusion.…”

Section: ͑23͒mentioning

confidence: 99%

“…This gives an additional compression component of Ϫ1.14ϫ10 Ϫ3 strain in the radial direction and a tension component of 0.62ϫ10 Ϫ3 strain in the axial direction of the bulk unreinforced alloy relative to the powder, which can be identified as a macrostrain caused by the extrusion. Therefore, the strains presented in Tables I and II 23 for thermally induced strain. However, despite relatively small anisotropy of the Al-6061 matrix, because of highly textured whisker reinforcements, a much smaller value for radial component is expected.…”

Section: ͑23͒mentioning

confidence: 99%

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Elastic-strain tensor by Rietveld refinement of diffraction measurements

Balzar

Dreele

Bennett

et al. 1998

Journal of Applied Physics

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A procedure to obtain all components of the elastic-strain tensor by simultaneous Rietveld refinement of diffraction patterns collected at different specimen orientations is described. The refined lattice parameters yield the hydrostatic strain component. If the lattice constants of the unstrained reference specimen are not known, the deviatoric strain tensor can still be determined. An anisotropic strain component may be refined for cubic and hexagonal crystal structures along with the isotropic. The method is applied to Al/SiC ͑short whisker͒ composites and systematic errors are assessed.

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Mechanical Behavior of Particle Reinforced Metal Matrix Composites

Chawla¹,

2001

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Metal matrix composites provide significantly enhanced properties Ð like higher strength, stiffness and weight savings Ð in comparison to conventional monolithic materials. Particle reinforced MMCs are attractive due to their cost-effectiveness, isotropic properties, and their ability to be processed using similar technology used for monolithic materials. This review captures the salient features of experimental as well as analytical and computational characterization of the mechanical behavior of MMCs. The main focus is on wrought particulate reinforced light alloy matrix systems, with a particular emphasis on tensile, creep, and fatigue behavior.

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Thermally and mechanically induced residual strains in Al-SiC composites

Cited by 85 publications

References 27 publications

Simulated small-angle scattering patterns for a plastically deformed model composite material

Simulated small-angle scattering patterns for a plastically deformed model composite material

Elastic-strain tensor by Rietveld refinement of diffraction measurements

Mechanical Behavior of Particle Reinforced Metal Matrix Composites

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