On the strength of discontinuous silicon carbide reinforced aluminum composites

Nardone, Vincent C.; Prewo, Karl M.

doi:10.1016/0036-9748(86)90210-3

Cited by 964 publications

(283 citation statements)

References 4 publications

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“…The strengthening mechanism through the load transfer from matrix to reinforcement in composite materials has been formulated by the shear-lag model [17][18][19] Recently, the generalized shear-lag model 20 and a new concept of effective aspect ratio for misaligned cylindrical whisker were suggested to analyze the load transfer efficiency of misaligned reinforcement in metal matrix considering both the aspect ratio and misorientation angle. In this study, the effects of aspect ratio, misorientation, and volume fraction of SiC reinforcement on creep resistance of SiC/2124Al composites is discussed related to the load transfer efficiency of SiC reinforcement based on the generalized shear-lag model.…”

Section: Introductionmentioning

confidence: 99%

Analysis of creep behavior of SiC/Al metal matrix composites based on a generalized shear-lag model

et al. 2004

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The creep behaviors of 20 vol% SiCw/2124Al, extruded with different ratios, and SiCp/2124Al, reinforced with 10-30 vol% SiC particles, were investigated to clarify the effects of aspect ratio, alignment, and volume fraction of reinforcement on creep deformation. The effective stresses on the matrix of SiC/Al composites are calculated based on the generalized shear-lag model. The minimum creep rates of SiCw/2124Al extruded with different ratios and SiCp/2124Al reinforced with different volume fractions of SiC particles are found to be similar under a same effective stress on matrix, which is calculated by the generalized shear-lag model. The subgrain sizes in matrices of crept SiC/Al composites are dependent on the effective stress on matrix but not on the applied stress on the composite. It is suggested that the role of SiC reinforcements is to increase the creep resistance of SiC/Al composite by reducing the effective stress on matrix.

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Section: Introductionmentioning

confidence: 99%

Analysis of creep behavior of SiC/Al metal matrix composites based on a generalized shear-lag model

et al. 2004

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“…During the past several decades, many attempts have been made to explore the relationship between microstructure and deformation behavior in MMCp. Continuum models including the cell model [1,2], the modified shear lag theory [3] and the homogenization models [4] lead to a dependence of flow stress on volume fraction of reinforcing particles but not on particle size. Current experimental results, however, have demonstrated that both particle size and volume fraction exert influence [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

A strain gradient-strengthening law for particle reinforced metal matrix composites

1999

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“…It has been demonstrated that the hightemperature deformation resistance of ceramic particulate reinforced composites increases with increasing particulate fraction. 17,18) Thus in the sliding process, alleviation of shear strain and reduction of the deformation zone depth are associated with the increase of SiC particulate content (Fig. 8).…”

Section: Transition To Severe Wearmentioning

confidence: 94%

Wear Transitions in Particulate Reinforced Copper Matrix Composites

2004

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The effects of applied load, sliding velocity and SiC volume fraction on the transitional behavior between mild and severe wear in SiC particulate reinforced copper matrix composites were studied under dry sliding wear condition. Increasing SiC fraction or decreasing sliding velocity delays the occurrence of severe wear up to higher transition load. Mechanically mixed layer (MML), which is markedly harder than that of the bulk material, is absent in the post-transition regime. The coverage rate of MML is affected by applied load and sliding velocity. SiC particulates act as load-bearing components and lessen the frictional deformation extent in the subsurface region. In the pre-transition regime, microcrack propagation induced detachment of MML and subsurface material are the primary wear mechanism. In the severe wear process, thermally activated subsurface deformation plays a significant role in the tear of surface layer from the substrate material.

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On the strength of discontinuous silicon carbide reinforced aluminum composites

Cited by 964 publications

References 4 publications

Analysis of creep behavior of SiC/Al metal matrix composites based on a generalized shear-lag model

Analysis of creep behavior of SiC/Al metal matrix composites based on a generalized shear-lag model

A strain gradient-strengthening law for particle reinforced metal matrix composites

Wear Transitions in Particulate Reinforced Copper Matrix Composites

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