Mechanical properties of aluminium-based particulate metal-matrix composites

Doel, T.J.A.; Loretto, M. H.; Bowen, P.

doi:10.1016/0010-4361(93)90174-7

Cited by 49 publications

(22 citation statements)

References 13 publications

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“…[4,5] There has been considerable research performed on the fracture of DRA materials, including those under dynamic loading conditions, [17] to investigate the role of microstructural features such as particle size, particle distribution, reinforcement level, reinforcement type, and matrix condition. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16] While modifications in these intrinsic characteristics serve to improve the fracture resistance of DRA materials, other approaches to increasing fracture resistance are available. For example, extrinsic toughening mechanisms [18] have been proposed [1,6,19] as a possible method of further increasing the damage tolerance of DRA material; this has also been useful in increasing the energy absorption under high-rate-penetration conditions.…”

Section: Introductionmentioning

confidence: 99%

Interface Effects on the Quasi-Static and Impact Toughness of Discontinuously Reinforced Aluminum Laminates

Osman

Hassan

Lewandowski

2008

Metall Mater Trans A

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Trilayer laminates consisting of two layers of aluminum alloy 7093 surrounding one layer of 7093/SiC/15 p were produced via two roll-bonding techniques as well as by adhesive bonding. The effects of systematic changes in interface characteristics (i.e., weak bond via roll bonding with a thin ductile interlayer material, stronger bond via roll bonding without a thin ductile interlayer, and strongest bond via adhesive bonding with a semibrittle material) on the subsequent laminate toughness was studied. The fracture resistance of the laminates and the constituent materials was examined via instrumented Charpy notched impact testing in the crack-arrester orientation as well as by fracture-toughness testing of bend bars tested in the crack-divider and the crack-arrester orientations. The notched impact resistance of the trilayer crack-arrester laminates was found to be greater than both monolithic 7093/SiC/15 p and 7093 samples of similar global thickness. The laminated structure promoted crack arrest, deflection, and large-scale deformation of the unreinforced layers, producing R-curve behavior. The tendency for interface delamination was predicted and confirmed based on recent mechanics-based analyses. The trilayer laminate structures tested in the crack-divider orientation exhibited a greater R-curve than either of the 7093/SiC/15 p or 7093 samples tested at similar global thickness. Both types of roll-bonded laminates (i.e., stronger interface and weak interface containing a thin metal interlayer) exhibited a greater enhancement in Charpy impact toughness and mode I fracture toughness than did the adhesively bonded (i.e., semibrittle interface) laminates. These relative improvements in toughness were rationalized by estimating the contributions to energy absorption by the delamination and crack bridging in these systems and by the effects of the interface type on these processes. These results are generally relevant to the performance of these materials under impact and under certain blast loading and penetration situations.

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Section: Introductionmentioning

confidence: 99%

Interface Effects on the Quasi-Static and Impact Toughness of Discontinuously Reinforced Aluminum Laminates

Osman

Hassan

Lewandowski

2008

Metall Mater Trans A

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“…4 and the deviation is found to be minimum. [19]. Also, a slight variation was found in the hardness of Al with 15 and 20 wt% of fly ash and noted that further increase of fly ash particles do not have any effect on hardness.…”

Section: Confirmation Of the Experimentsmentioning

confidence: 91%

Theoretical and experimental investigation of wear characteristics of aluminum based metal matrix composites using RSM

Selvi¹,

Rajasekar²

2015

J Mech Sci Technol

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The tribological properties such as wear rate, hardness of the aluminum-fly ash composite synthesized by stir casting were investigated by varying the weight % of fly ash from 5 to 20 with constant weight % of zinc and magnesium metal powder. A mathematical model was developed to predict the wear rate of aluminum metal matrix composites and the adequacy of the model was verified using analysis of variance. Scanning electron microscopy was used for the microstructure analysis which showed a uniform distribution of fly ash in the metal matrix. Energy -dispersive X-ray spectroscopy was used for the elemental analysis or chemical characterization of a sample. The results showed that addition of fly ash to aluminum based metal matrix improved both the mechanical and tribological properties of the composites. The fly ash particles improved the wear resistance of the metal matrix composites because the hardness of the samples taken increased as the fly ash content was increased.

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“…[1][2][3] However, at high temperatures, matrix/SiCp interfaces favor MgO formation, promoting premature failure and severe brittleness. [4][5][6] Therefore, in some potential applications such as cylinders, pistons and drive shafts the material used should be fairly resistant to oxidation because it is exposed to air and fuel at high temperatures.…”

Section: Introductionmentioning

confidence: 98%

Effect of La Surface Coatings on Oxidation Behavior of Aluminum Alloy/SiCp Composites

et al. 2007

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The oxidation behavior of aluminum-matrix-composites (A3 xx.x/SiCp) has been studied after La deposition with conversion and electrolytic treatments. Kinetics data of the corrosion process were obtained from gravimetric tests performed at different temperatures (350, 425 and 500°C). The nature of the corrosion products and the influence of the microstructure on the morphology and growth of the oxidation layer were analyzed by scanning-electron and atomic-force microscopy, X-ray photoelectron spectroscopy and X-ray diffraction. The extent of oxidation degradation in untreated composites was characterized by a phenomenon of oxidation preferentially localized in matrix/ SiCp interfaces favoring MgO formation. La coatings favored a homogeneous oxidation of the composite surface favoring MgAl 2 O 4 spinel formation. In addition, this oxide increased the surface hardness of materials.

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Mechanical properties of aluminium-based particulate metal-matrix composites

Cited by 49 publications

References 13 publications

Interface Effects on the Quasi-Static and Impact Toughness of Discontinuously Reinforced Aluminum Laminates

Interface Effects on the Quasi-Static and Impact Toughness of Discontinuously Reinforced Aluminum Laminates

Theoretical and experimental investigation of wear characteristics of aluminum based metal matrix composites using RSM

Effect of La Surface Coatings on Oxidation Behavior of Aluminum Alloy/SiCp Composites

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