Aluminum-Based Cast In Situ Composites: A Review

Pramod, S.; Bakshi, Srinivasa Rao; Murty, B.S.

doi:10.1007/s11665-015-1424-2

Cited by 184 publications

(63 citation statements)

References 115 publications

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“…combination of their constituents. [55][56][57] Al/TiB 2 , Al/ TiC, Al/ZrB 2 , Al/SiC, Al/AlN, Al/Al 2 O 3 , and Al/Mg 2 Si have been reported to be able to improve the Young's modulus of cast Al alloys. [58][59][60] The improvement of Young's modulus in AMCs can be successfully achieved through a variety of casting processes, including gravity casting, stirring casting, investment casting, die casting, vacuum-assisted casting, semisolid casting, and squeeze casting for manufacturing shaped components, or making billets by direct chill casting for further processing such as forging, extrusion or rolling.…”

Section: Other Bimetallic Materialsmentioning

confidence: 99%

A review on high stiffness aluminum-based composites and bimetallics

Amirkhanlou

2019

Critical Reviews in Solid State and Materials Sciences

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The Young's modulus of aluminum-based materials is one of the most important mechanical properties in controlling structural performance. The improvement of the Young's modulus of castable aluminum-based materials is essential for improving their competiveness in light weighting structural applications. Currently, there are limited options for cast aluminum alloys with outstanding Young's modulus. Also, for further stiffness improvement and thereby weight lightening, in-depth understanding of the relevant mechanisms for modulus improvement in aluminum alloys is necessary. This review focuses on the Young's modulus of cast aluminum-based composites, as well as aluminum alloys reinforced with continuous metallic fibers (bimetallic materials). The effect of different chemical elements in cast alloys, the constituents of in-situ and ex-situ formed aluminum matrix composites, and the wire-enhanced bimetallic materials on the Young's modulus of aluminum-based materials are reviewed. The Young's modulus of cast aluminum alloys can be improved by: (a) introducing high modulus reinforcement phasessuch as TiB 2 , SiC, B 4 C, and Al 2 O 3into aluminum by in-situ reactions or by ex-situ additions; and (b) forming bimetallic materials with metallic wire/bar reinforcement in the aluminum matrix. The performance of a stiff aluminum alloy depends on the volume fraction, size, and distribution of the high modulus phases as well as the interface between reinforcement and Al matrix. One of the major concerns is the reduction of the ductility of castings after adding specific high modulus phases to increase the Young's modulus. Further research into the improvement of Young's modulus and the ductility of aluminum alloys is necessary through proper selection of reinforcement, optimizing interface, and distribution of reinforcement.

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Section: Other Bimetallic Materialsmentioning

confidence: 99%

A review on high stiffness aluminum-based composites and bimetallics

Amirkhanlou

2019

Critical Reviews in Solid State and Materials Sciences

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“…Stir-casting is the most common, economical and highly reproducible method used to fabricate metal matrix composites [11,12]. Furthermore, Singla et al [5] enhanced the dry sliding behaviour of 6061 Al-alloy after reinforcing with variants of ceramic particles such as SiC, red mud and Al 2 O 3 by the stir-casting method.…”

Section: Introductionmentioning

confidence: 99%

Dry sliding wear behavior of Al 6082 metal matrix composites reinforced with red mud particles

2020

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The present study aims at investigating the dry sliding wear behavior of Al-based 6082 metal matrix composites (AMMCs) reinforced with red mud particles by pin-on-disc configuration. AMMCs were fabricated with three different weight fractions of red mud particles ranging from 2 to 6% by using the stir-casting method. The friction coefficients and volumetric wear rates were continuously evaluated under normal loads of 10-30 N and sliding speed of 1.5 m s −1 for the constant sliding distance of 1000 m. Microstructural analysis indicated that red mud particles are more or less uniformly dispersed throughout the Al matrix with minimal agglomeration. Experimental data shows that microhardness and tensile strengths of both the as-cast and heat-treated composites are steadily improved by increasing the amount of reinforced red mud particles but at the cost of ductility. Analysis of worn surfaces revealed that delamination and abrasion are dominant wear mechanisms for the case of the heat-treated composites are whereas the adhesion wear mechanism for the base alloy. The composite containing 4% red mud particles experienced the lowest wear rate at a normal load of 30 N and sliding speed of 1.5 m s −1 as compared to other composites including the base alloy. While the composite with 2% red mud particles shows the lowest friction coefficient, base alloy exhibited the highest friction coefficient.

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“…They show high specific modulus (E/µ) and yield stress (·¾/µ), higher wear resistance and good elevated temperature resistance. 1) TiC has been recognized as one of the most important reinforced ceramic for metal matrix composite materials due to its excellent properties such as high hardness and high temperature stability. 2,3) There are different routes for achieving an AlTiC metal matrix composite but recently the in-situ casting is one of the most popular because of the simplicity of the process and promising results.…”

Section: Introductionmentioning

confidence: 99%

SEM and TEM Studies on <i>In-Situ</i> Cast Al–TiC Composites

et al. 2019

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This work concerns microstructure investigation of aluminum based composites strengthened with the TiC nanoparticles. The composites were fabricated by the casting method combined with in-situ formation of TiC particles. Transmission electron microscopy observation shown that the average size of TiC particles was close to 140 nm. HRTEM investigation of the interface between Al matrix and TiC particles shown the existence of misfit dislocation located in the Al-matrix, 2 nm far from interface boundary. Two other, bigger kinds of particles with size of several micrometers and blocky shape of ¡-Al 2 O 3 and TiAl 3 phases were also identified in the investigated composites which can influence both strengthening mechanism and plasticity. [

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Aluminum-Based Cast In Situ Composites: A Review

Cited by 184 publications

References 115 publications

A review on high stiffness aluminum-based composites and bimetallics

A review on high stiffness aluminum-based composites and bimetallics

Dry sliding wear behavior of Al 6082 metal matrix composites reinforced with red mud particles

SEM and TEM Studies on <i>In-Situ</i> Cast Al–TiC Composites

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