Processing techniques for particulate-reinforced metal aluminium matrix composites

Srivatsan, T. S.; Ibrahim, I. A.; Mohamed, Farghalli A.; Lavernia, Enrique J.

doi:10.1007/bf01113872

Cited by 198 publications

(82 citation statements)

References 30 publications

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“…The large volume fraction of alumina was observed to profoundly affect the behavior of the metal matrix composites of aluminium during fabrication as well as sintering. Within the range of input parameters studied, it was observed that the Vickers micro-hardness decreased consistently with the increase in particle size and %weight of Al 2 O 3 [25][26][27]. However, the effects of sintering temperature and time were not quite consistent.…”

Section: Discussionmentioning

confidence: 99%

Development of Mathematical Model to Predict Micro - Hardness of Al7075/Al2O3 Composites Produced by Stir-Casting

Deshmanya¹,

Purohit²

2012

JESTR

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The hardness model was developed for aluminium metal matrix composites having Al7075 matrix reinforced with particles of Al 2 O 3 and fabricated by stir-casting. Four factors, five levels, central composite, rotatable design matrix was used to optimize the number of experiments. Adequacy of the model was tested by employing analysis of variance (ANOVA). The experimental results showed that size of reinforcement was the major parameter influencing the hardness of the composites among the other control factors, followed by weight fraction of reinforcement. However, the holding temperature and time had lower effects. The model suggests that one must take into account the interaction of parameters for predicting hardness of composites so that the optimal combination of the testing parameters could be determined and predicted.

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Section: Discussionmentioning

confidence: 99%

Development of Mathematical Model to Predict Micro - Hardness of Al7075/Al2O3 Composites Produced by Stir-Casting

Deshmanya¹,

Purohit²

2012

JESTR

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“…En la actualidad los materiales compuestos de matriz de aluminio son de especial interés, habiéndose estudiado en profundidad los sistemas que incorporan partículas de carburo de silicio y alúmina (1)(2)(3)(4)(5). La incorporación de nuevos tipos de partículas de refuerzo es de especial interés a fin de mejorar las propiedades finales del compuesto así como evitar algunos de los inconvenientes de la utilización de partículas cerámicas.…”

Section: Introductionunclassified

Investigación de la interacción matriz/refuerzo en materiales compuestos AA6061/partículas Ti-Al mediante análisis de imagen

Martínez¹,

Amigó²,

Salvador³

et al. 2004

Bol. Soc. Esp. Ceram. Vidr.

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La presente comunicación compara la estabilidad que presentan diferentes refuerzos intermetálicos (Ti 3 Al y TiAl) adicionados a una matriz de aluminio (AA6061), empleándose para ambos refuerzos diferentes contenidos del mismo. El método de fabricación elegido combina una vía pulvimetalúrgica con un proceso secundario de extrusión en caliente. Para estudiar la interacción del refuerzo con la matriz, se llevan a cabo tratamientos térmicos de solubilización en estufas con atmósfera controlada, a una temperatura de 530ºC y variando el tiempo entre 0 y 24 h. Se utiliza la microscopía electrónica de barrido (MEB) para el estudio microestructural de los compuestos, calculándose el espesor y la velocidad de crecimiento de las capas de reacción mediante técnicas de análisis de imagen. La estequiometría de las capas formadas se determina mediante microanálisis por energías dispersivas de rayos X (EDX). Palabras clave: compuestos, aluminio, partículas intermetálicas, interacción matriz/refuerzo, análisis imagen. Image análisis study of matrix reinforcement interaction on AA6061 / Ti-Al particle reinforced compositesIn this paper is compared the stability of different contents of intermetallic particles (Ti 3 Al and TiAl) in an aluminium alloy (AA6061). A powder metallurgy route combined with a secondary hot extrusion process, was followed to fabricate the composites. The matrix/ reinforcement interaction was enhanced by solubilization heat treatments at temperatures ranging form 470 to 530ºC and times from 1 to 24 h. Scanning electron microscopy was employed to study the microstructure of the composites. The reaction layer thickness and its growing speed were determined by image analysis. The stoichiometric composition was obtained by dispersive energy diffraction of X ray.

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“…Owing to the low density, low melting point, high specific strength and thermal conductivity of aluminum, a wide variety of ceramic particulates such as SiC, B 4 C, Al 2 O 3 , TiC and graphite have been reinforced into it. Among these particulates, TiB 2 has emerged as an outstanding reinforcement (1)(2)(3). In situ synthesizing of MMCs involves the production of reinforcement within the matrix during composite fabrication.…”

Section: Introductionmentioning

confidence: 99%

Heat Treatment of Al/TiB2 MMC with Different Moulds

Rajaravi¹,

Sivabalan²,

Shivathanu³

et al. 2018

IJCTR

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:In this work, A356 cast aluminium alloy with 6% TiB 2 in-situ formed MMCs have been fabricated using stir casting route and poured at sand and permanent moulds. The composite was synthesized using stir casting technique. The A356 cast aluminium alloy and all synthesized composites are subjected to solutionizing treatment at a temperature of 540˚C for one hour, followed by quenching in hot water at 43˚C. The quenched samples are then subjected to artificial aging at 171˚C for 8 hours. Morphology of the cast composites was studied in detail by the optical microstructure. The Mechanical properties have been carried over on both sand and permanent of Al/TiB 2 MMC composites before and after heat treatment. Under heat treated condition, Al/TiB2 composites showed better tensile strength and hardness when contrasted with base Al matrix alloy. And different moulds were investigated and its comparison shows that the tensile and hardness value of Al/TiB 2 MMC is higher than permanent mould.

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Processing techniques for particulate-reinforced metal aluminium matrix composites

Cited by 198 publications

References 30 publications

Development of Mathematical Model to Predict Micro - Hardness of Al7075/Al2O3 Composites Produced by Stir-Casting

Development of Mathematical Model to Predict Micro - Hardness of Al7075/Al2O3 Composites Produced by Stir-Casting

Investigación de la interacción matriz/refuerzo en materiales compuestos AA6061/partículas Ti-Al mediante análisis de imagen

Heat Treatment of Al/TiB2 MMC with Different Moulds

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