Analysis of active cooling through nickel coated carbon fibers in the solidification processing of aluminum matrix composites

Gupta, Nïkhil; Nguyen, Nguyen Q.; Rohatgi, Pradeep K.

doi:10.1016/j.compositesb.2011.01.004

Cited by 25 publications

(13 citation statements)

References 23 publications

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“…Residual stresses were found increase with the volume fraction of the fibres in the heat removal direction and the direction normal to it for air-cooling and water-cooling, but for constant temperature cooling, they remained approximately the same for different volume fractions in the heat removal directions and decreased with the volume fraction of fibres in other directions [22,49,50] . In a nickel-coated carbon-fibre-reinforced AMC, thermal stresses arising due to temperature gradient resulted in the failure of nickel coating [51] . Thermal residual stresses were significantly reduced by using a thermal expansion clamp during curing in the case of a carbon-fibrereinforced aluminium laminates (CARALL) [52] .…”

Section: Thermal Stressesmentioning

confidence: 99%

The behaviour of aluminium matrix composites under thermal stresses

Dash

Sukumaran

Ray

2014

Science and Engineering of Composite Materials

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The present review work elaborates the behaviour of aluminium matrix composites (AMCs) under various kinds of thermal stresses. AMCs find a number of applications such as automobile brake systems, cryostats, microprocessor lids, space structures, rocket turbine housing, and fan exit guide vanes in gas turbine engines. These applications require operation at varying temperature conditions ranging from high to cryogenic temperatures. The main objective of this paper was to understand the behaviour of AMCs during thermal cycling, under induced thermal stresses and thermal fatigue. It also focuses on the various thermal properties of AMCs such as thermal conductivity and coefficient of thermal expansion (CTE). CTE mismatch between the reinforcement phase and the aluminium matrix results in the generation of residual thermal stress by virtue of fabrication. These thermal stresses increase with increasing volume fraction of the reinforcement and decrease with increasing interparticle spacing. Thermal cycling enhances plasticity at the interface, resulting in deformation at stresses much lower than their yield stress. Low and stable CTE can be achieved by increasing the volume fraction of the reinforcement. The thermal fatigue resistance of AMC can be increased by increasing the reinforcement volume fraction and decreasing the particle size. The thermal conductivity of AMCs decreases with increase in reinforcement volume fraction and porosity.

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Section: Thermal Stressesmentioning

confidence: 99%

The behaviour of aluminium matrix composites under thermal stresses

Dash

Sukumaran

Ray

2014

Science and Engineering of Composite Materials

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“…It was found that the average microhardness of matrix alloy is about 1.37 times higher than that of the as-cast alloy. The hardening of the matrix alloy can be attributed to the residual stress induced by the thermal expansion mismatch between carbon fiber and the matrix [8,28], as well as the grain refinement resulting from the high solidification rate during the gas pressure infiltration process [8]. Considering the hardening of the matrix alloy, the experimental tensile stress-strain curve of the as-cast alloy (the black line in Figure 4) was uniformly magnified by a factor of 1.37 to represent the in-situ tensile behavior of the matrix alloy, as shown in the red line in Figure 4.…”

Section: Micromechanical Modelmentioning

confidence: 99%

“…It is generally recognized that the change in the material property of the constituents in the Cf/Al composites is inevitable in most CF/Al composites fabricated by the liquid infiltration technique due to the sensitivity of the microstructure of matrix alloy to the processing conditions [8,9] and the degradation of the carbon fiber, which can be damaged by a molten aluminum alloy [10,11,12]. In particular, the chemical reaction between the fiber and matrix alloy often results in an imperfect interface with uncertain bonding strength [13,14,15].…”

Section: Introductionmentioning

confidence: 99%

Micromechanical Modeling of Damage Evolution and Mechanical Behaviors of CF/Al Composites under Transverse and Longitudinal Tensile Loadings

Wang

Yang

et al. 2019

Materials

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This paper investigates the progressive damage and failure behavior of unidirectional graphite fiber-reinforced aluminum composites (CF/Al composites) under transverse and longitudinal tensile loadings. Micromechanical finite element analyses are carried out using different assumptions regarding fiber, matrix alloy, and interface properties. The validity of these numerical analyses is examined by comparing the predicted stress-strain curves with the experimental data measured under transverse and longitudinal tensile loadings. Assuming a perfect interface, the transverse tensile strength is overestimated by more than 180% and the transverse fracture induced by fiber failure is unrealistic based on the experimental observations. In fact, the simulation and experiment results indicate that the interface debonding arising from the matrix alloy failure dominates the transverse fracture, and the influence of matrix alloy properties on the mechanical behavior is inconspicuous. In the case of longitudinal tensile testing, however, the characteristic of interface bonding has no significant effect on the macroscopic mechanical response due to the low in-situ strength of the fibers. It is demonstrated that ultimate longitudinal fracture is mainly controlled by fiber failure mechanisms, which is confirmed by the fracture morphology of the tensile samples.

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“…Such metal coatings improved the wetting behavior of SCFs with Al, thus improving the distribution uniformity of SCF reinforcements, reducing interfacial reactions, and improving composite hardness [12,13]. Metal coatings on SCFs positively affect the mechanical and tribological properties of the composites [14,15]. The beneficial effects of Cu or Ni metal coatings on the wear behaviors of SCF-reinforced Al6061 alloy have been reported [16].…”

Section: Introductionmentioning

confidence: 99%

Improved Friction and Wear Properties of Al6061-Matrix Composites Reinforced by Cu-Ni Double-Layer-Coated Carbon Fibers

Dong

Yuan²,

Cheng

et al. 2020

Metals

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The friction and wear properties of an Al6061 alloy reinforced with carbon fibers (CF) modified with Cu-Ni bimetallic layers were researched. Cu-Ni double layers were applied to the CF by electroless plating and Al6061-matrix composites were prepared by powder metallurgy technology. The metal-CF/Al interfaces and post-dry-wear-testing wear loss weights, friction coefficients, worn surfaces, and wear debris were characterized. After T6 heat treatment, the interfacial bonding mechanism of Cu-Ni-CF changed from mechanical bonding to diffusion bonding and showed improved interfacial bonding strength because the Cu transition layer reduced the fiber damage caused by Ni diffusion. The metal–CF interfacial bonding strongly influenced the composite’s tribological properties. Compared to the Ni-CF/Al and Cu-CF/Al composites, the Cu-Ni-CF/Al composite showed the highest hardness, the lowest friction coefficient and wear rate, and the best load-carrying capacity. The wear mechanisms of Cu-Ni-CF/Al composite are mainly slight abrasive wear and adhesive wear.

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Analysis of active cooling through nickel coated carbon fibers in the solidification processing of aluminum matrix composites

Cited by 25 publications

References 23 publications

The behaviour of aluminium matrix composites under thermal stresses

The behaviour of aluminium matrix composites under thermal stresses

Micromechanical Modeling of Damage Evolution and Mechanical Behaviors of CF/Al Composites under Transverse and Longitudinal Tensile Loadings

Improved Friction and Wear Properties of Al6061-Matrix Composites Reinforced by Cu-Ni Double-Layer-Coated Carbon Fibers

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