The effect of participate reinforcement on the sliding wear behavior of aluminum matrix composites

Roy, Manish; Venkataraman, B.; Bhanuprasad, V.V.; Mahajan, Y. R.; Sundararajan, G.

doi:10.1007/bf02651761

Cited by 211 publications

(74 citation statements)

References 15 publications

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“…The hardness of the MMCs increases with the volume fraction of particulates in the alloy matrix. The higher hardness of the composites can be attributed to the fact that B 4 C particles act as obstacles to the motion of dislocation [21][22][23][24][25]. As shown, hardness increases with the amount of present B 4 C particles.…”

Section: Resultsmentioning

confidence: 78%

Effect of coated B4C reinforcement on mechanical properties of squeeze cast A356 composites

Mazahery¹,

Shabani²,

Rahimipour³

et al. 2012

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In the present study, attempts were made to coat the B4C powders with TiB2 via a sol-gel process, and then squeeze cast A356 matrix composites reinforced with coated B4C particles were fabricated. X-ray diffraction studies also confirmed the existence of boron carbide and some other reaction products such as TiB2, AlB2 and Al3BC in composite samples. It was observed that the amount of porosity increased with increasing the volume fraction of composites. Tensile behavior and hardness of unreinforced alloy and composites were evaluated. It was noted that the elastic constant, strain-hardening and UTS of the metal matrix composites (MMCs) were higher than those of the un-reinforced Al alloy and increased with increasing of coated B4C content. The strengthening of particulate reinforced metal-matrix composites is associated with a high dislocation density in the matrix due to the difference in coefficient of thermal expansion between the reinforcement and the matrix. K e y w o r d s : MMCs, aluminum, boron carbide, sol-gel processing

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Section: Resultsmentioning

confidence: 78%

Effect of coated B4C reinforcement on mechanical properties of squeeze cast A356 composites

Mazahery¹,

Shabani²,

Rahimipour³

et al. 2012

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“…Con respecto al comportamiento frente a desgaste de los distintos materiales estudiados, diferentes estudios han llegado a la conclusión ya apuntada en la introducción que en los materiales compuestos los dos factores que más influencian la resistencia al desgaste son el porcentaje de refuerzo y el tamaño del mismo (1,(9)(10)(11)(12). Como en los compuestos estudiados la fracción volúmica de refuerzo empleada se mantiene constante e igual al 15%, las diferencias observadas deben ser debidas, fundamentalmente al tamaño de los refuerzos.…”

Section: Discussionunclassified

“…El comportamiento tribológico a temperatura ambiente de los AMCs ha sido ampliamente estudiado para diferentes sistemas, tanto al considerar diferentes matrices (desde aluminio de pureza a diferentes aleaciones) como refuerzos: Al 2 O 3 , SiC, TiC, TiB 2 , B 4 C, etc (1,2). Sin embargo, se debe de tener en cuenta que es difícil hacer una comparación cuantitativa entre los resultados obtenidos por los diferentes autores debido a que las tasas de desgaste y los coeficientes de fricción están muy influenciados por el sistema de ensayo (donde por ejemplo se utilizan los de "ball on disk", "pin on disc", "block on ring") y las variables del mismo (esfuerzo nominal de contacto, velocidad de deslizamiento, carga normal,...).…”

Section: Introductionunclassified

Comportamiento frente al desgaste en materiales compuestos de aluminio reforzados con partículas cerámicas

Busquets-Mataix¹,

Martinez²,

Amigó³

et al. 2004

Bol. Soc. Esp. Ceram. Vidr.

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El presente artículo trata sobre las propiedades tribológicas en materiales compuestos de matriz de aleación de aluminio AA6061, reforzados con partículas cerámicas de diferente naturaleza: TiB 2 , B 4 C, Si 3 N 4 , SiC y Al 2 O 3 . Los materiales compuestos fueron obtenidos mediante un procedimiento de consolidación en estado sólido que combina la pulvimetalurgia con un proceso de extrusión en caliente. El estudio tribológico realizado se basó en una metodología de ensayo del tipo pin-on-ring con deslizamiento en seco (sin lubricación). Se analizaron para cada caso el coeficiente de rozamiento y la tasa de desgaste en función de la distancia de deslizamiento. Asimismo, las muestras ensayadas se observaron mediante microscopía electrónica de barrido. Los resultados obtenidos demuestran que las tasas de desgaste de los compuestos son inferiores en todos los casos a los de la matriz sin reforzar. Entre los compuestos, las diferencias encontradas son debidas al tamaño medio de las partículas de refuerzo, obteniéndose un menor desgaste para tamaños de refuerzo mayores, mientras que la naturaleza de los mismos no parece tener una marcada influencia. Con respecto al coeficiente de rozamiento, no se ha encontrado una tendencia parecida entre los compuestos estudiados, obteniéndose en unos casos un valor mayor y en otros menor que con respecto a la aleación sin reforzar. Palabras clave: Compuestos de matriz de aluminio, refuerzos cerámicos, desgaste, tribología. Wear behaviour on ceramic particle reinforced aluminium matrix composites.The present work deals with the wear behaviour on AA6061 based aluminium matrix composites reinforced with different kinds of ceramic particles: TiB 2 , B 4 C, Si 3 N 4 , Al 2 O 3 y SiC. Composites were obtained by means of a solid-state consolidation method, combining both powder metallurgy processing and hot extrusion. The study carried out was based on a pin-on-ring apparatus under dry sliding conditions (dry friction). Both friction coefficient and wear rate were measured for each composite. Scanning Electron Microscope (SEM) was used to analyse wear and the tribolayer formed. Results show that wear rate is lower in composites than in the unreinforced alloy in every case, as expected. Differences among composites are probably related to different particle size rather than nature of reinforcements. On the other hand, friction coefficient do not show a trend on composites, being lower than the base alloy in some cases and higher in others.Keywords: Aluminium matrix composites, ceramic reinforcement, wear, tribology. INTRODUCCIÓNEn los últimos años se ha desatado un importante interés en las propiedades tribológicas de las aleaciones de aluminio debido a la potencial reducción de peso que se puede obtener en piezas y componentes de importancia en gran número de sectores industriales, sobretodo en la industria del automóvil. Aunque la resistencia al desgaste de las aleaciones de aluminio es pobre en general, pueden obtenerse una mejora sustancial con la introducción de refuerzos de elevada...

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“…On the contrary, the opposite results have been also reported. Roy et al 29) observed a decrease by a factor of 3-4 in the wear rate by 10-20 vol% SiC particle and Narayan et al 13) concluded that the wear resistance of the unreinforced alloy is better than that of the composites for A2014/Al 2 O 3 composites. Gui et al 17) reported that Al-Cu-Mn/SiCp composites produced by spray deposition exhibited an improved wear resistance for whole range of applied load, but the improvement was not significant.…”

Section: Wear Ratementioning

confidence: 99%

Dry Sliding Wear Behavior of A2218/Al<SUB>3</SUB>Fe Composites Fabricated by Plasma Synthesis Method

et al. 2002

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The wear behavior of an A2218 alloy and an A2218/Al 3 Fe composite fabricated by the plasma synthesis method was investigated under dry sliding conditions. The wear tests were carried out at a sliding speed of 0.2 m/s and at the load range of 3-600 N. The variation of wear rate with applied load is composed of two regions for both materials and the two regions belong to mild wear. On the basis of observation and analysis on the worn surface, subsurface and the wear debris, the wear mechanism acting on each region was identified. At low loads, oxidative wear is the main wear mechanism and at high loads, the wear is controlled mainly by delamination and adhesive wear mechanism and oxidative wear is an additional wear mechanism. The A2218/Al 3 Fe composite exhibits an improved wear resistance at lower loads. On the contrary, at higher loads, due to the presence of the mechanical mixed layer on the worn surface of the A2218 monolithic alloy, both the monolithic alloy and composite exhibit similar wear rate.

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The effect of participate reinforcement on the sliding wear behavior of aluminum matrix composites

Cited by 211 publications

References 15 publications

Effect of coated B4C reinforcement on mechanical properties of squeeze cast A356 composites

Effect of coated B4C reinforcement on mechanical properties of squeeze cast A356 composites

Comportamiento frente al desgaste en materiales compuestos de aluminio reforzados con partículas cerámicas

Dry Sliding Wear Behavior of A2218/Al<SUB>3</SUB>Fe Composites Fabricated by Plasma Synthesis Method

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