Solidification of particle-reinforced metal-matrix composites

Hanumanth, G.S.; Irons, G. A.

doi:10.1007/bf02915665

Cited by 39 publications

(24 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…the particles (or particle clusters) simply settle under gravity until becoming packed at the cavity bottom or entrapped by the advancing mush. The bottom-cooled configuration (cases C1 and C2) is similar to the experiments performed by Hanumanth and Irons, [35] who also present a one-dimensional model. Under one-dimensional conditions, the present model can be shown to approximately reduce to their model, with the main exception of the hindered-settling function used (Section II).…”

Section: B One-dimensional Composite Solidificationmentioning

confidence: 80%

“…Liquid density and expansion coefficient values shown in Table IV (utilized in the two-dimensional simulations) have been interpolated from the data of Glauner et al [83] Note that the particle thermal conductivity k p is taken as the low-purity value, which may overestimate the local solidification time as discussed in Hanumanth and Irons. [35] A.…”

Section: Resultsmentioning

confidence: 98%

“…Comparisons of one-dimensional sedimentation results to experiments from the literature are presented in Section IV. Validation of the heat transfer and settling parts of the model for composite solidification can, in principle, be found in Hanumanth and Irons, [35] since the current model essentially reduces to their model for onedimensional conditions, as discussed subsequently.…”

Section: Numerical Implementationmentioning

confidence: 99%

“…The fact that the latter relation overestimates the settling rates was also found in the recent study by Hanumanth and Irons. [35] Figures 5(b) and (c) plot the time evolution of the denuded and packed zone interface heights during sedimentation of particle clusters of initial concentration 0.05 (case S2) and 0.15 (case S3), respectively. In either case, particles of diameter d p ϭ 14 m are assumed to form clusters of diameter d c ϭ 38 m and an internal particle fraction ε pi ϭ 0.42.…”

Section: One-dimensional Sedimentationmentioning

confidence: 99%

“…Rohatgi et al also developed a one-dimensional heat-transfer model to investigate the effect of stationary particles on temperature profiles and interface velocities in a pure-substance matrix. [34] Particle settling concurrent with alloy solidification has very recently been modeled by Hanumanth and Irons, [35] who compared results of a one-dimensional enthalpy model to experiments in A356/SiC systems. In their model, particle settling and mushy zone evolution were accounted for using the Richardson-Zaki hindered settling correlation and Scheil equation, respectively.…”

Section: Metal-matrix Particulate Composites (Mmpcs)mentioning

confidence: 99%

See 4 more Smart Citations

Modeling of solidification of metal-matrix particulate composites with convection

Feller

Beckermann

1997

Metall Mater Trans B

View full text Add to dashboard Cite

A multiphase model for the alloy solidification of metal-matrix particulate composites with convection is developed. Macroscopic transport equations are written for each phase, with unknown parameters modeled through supplementary relations pertinent to the solidification of a binary alloy matrix containing a stationary solid phase and generally nonstationary spherical particles. The model is applied to various one-and two-dimensional systems containing an Al-7 wt pct Si/SiC composite. One-dimensional sedimentation results in nonclustering and clustering particle systems show good agreement with experiments. One-dimensional composite solidification results illustrate the effect of particle clustering and cooling direction on the final macroscopic particle distribution. Two-dimensional results in various unreinforced and reinforced systems illustrate macroscopic particle segregation and its effect on buoyancy-driven melt convection and species macrosegregation. Results indicate a nearly uniform particle distribution for relatively small particles due to negligible particle settling prior to entrapment. For relatively large particles, significant particle settling prior to entrapment results in large denuded and packed zones in the casting. Fluid flow and macrosegregation during solidification are substantially reduced in the presence of particles, due to the relatively large interfacial drag exerted on the liquid by the stationary mush and particle phases.

show abstract

Section: B One-dimensional Composite Solidificationmentioning

confidence: 80%

Section: Resultsmentioning

confidence: 98%

Section: Numerical Implementationmentioning

confidence: 99%

Section: One-dimensional Sedimentationmentioning

confidence: 99%

Section: Metal-matrix Particulate Composites (Mmpcs)mentioning

confidence: 99%

See 3 more Smart Citations

Modeling of solidification of metal-matrix particulate composites with convection

Feller

Beckermann

1997

Metall Mater Trans B

View full text Add to dashboard Cite

show abstract

Influence of boron carbide content on the microstructure, tensile strength and fracture behavior of boron carbide reinforced aluminum metal matrix composites

Raj

Thakur

2018

Materialwissenschaft Werkst

View full text Add to dashboard Cite

In the present work, an indigenously developed low cost modified stir casting technique is developed for the processing of 6061 Al‐B4C composites containing high‐volume fraction of boron carbide particles (up to 20 vol. %). The influence of varying reinforcement content on the spatial distribution of boron carbide in the aluminum matrix is qualitatively characterized using scanning electron microscope. At a lower volume fraction of reinforcement, wide particle free zone and large interparticle spacing were observed in the matrix while the composite with high reinforcement content displayed relatively homogeneous and discrete particle distribution. X‐ray diffraction analysis confirms the presence of only aluminum and boron carbide diffraction peaks, indicating that no significant reaction occurs during composite processing. The tensile behavior of composites revealed that strength and ductility are influenced by varying particulate content. The quantitative analysis of strengthening mechanism in the casted composites showed that higher volume fraction of boron carbide lead to larger values of thermal dislocation strengthening, grain size and strain gradient strengthening. The morphology of fracture surfaces reveals the presence of dimple network and the average size of dimples gradually decreases with the increase in particulate content, which indicates the co‐existence of ductile and brittle fracture.

show abstract

Prediction of Cooling Curves for Squeeze Cast Al/SiCp Composites Using Finite Element Analysis

Gurusamy

Prabu

Paskaramoorthy

2015

Metall Mater Trans A

View full text Add to dashboard Cite

Solidification of particle-reinforced metal-matrix composites

Cited by 39 publications

References 15 publications

Modeling of solidification of metal-matrix particulate composites with convection

Modeling of solidification of metal-matrix particulate composites with convection

Influence of boron carbide content on the microstructure, tensile strength and fracture behavior of boron carbide reinforced aluminum metal matrix composites

Prediction of Cooling Curves for Squeeze Cast Al/SiCp Composites Using Finite Element Analysis

Contact Info

Product

Resources

About