Tribological characterization of Al7075–graphite composites fabricated by mechanical alloying and hot extrusion

Deaquino-Lara, R.; Soltani, N.; Bahrami, Amin; Gutiérrez-Castañeda, E.; García-Sánchez, E.; Hernández-Rodríguez, M.A.L.

doi:10.1016/j.matdes.2014.11.045

Cited by 121 publications

(31 citation statements)

References 33 publications

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“…Also, by employing new methods for synthesizing, it is possible to increase the mechanical properties by incorporating graphite. Deaquino-Lara et al [60] produced Al7075-graphite composites by mechanical alloying (MI) and hot extrusion in order to increase the hardness of composites. Hardness is one of the most important factors that affect tribological properties of self-lubricating aluminum composites according to Archard equation [93]:…”

Section: Self-lubricated Aluminum Compositesmentioning

confidence: 99%

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Influences of graphite reinforcement on the tribological properties of self-lubricating aluminum matrix composites for green tribology, sustainability, and energy efficiency—a review

Omrani

Moghadam

Menezes

et al. 2015

Int J Adv Manuf Technol

134

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Aluminum/graphite (Al/Gr) composites have been used as self-lubricating materials due to the superior lubricating effect of graphite during sliding. This paper summarizes various tribological aspects of self-lubricating aluminum composites. The influence of various factors such as (a) material factors, graphite size and volume fraction, and (b) mechanical factors, applied load and sliding speed on the tribological properties of self-lubricating aluminum composites, is discussed. Furthermore, the tribological properties of selflubricating composites as a function of these parameters and the active wear mechanism involved in various systems are discussed. Bringing self-lubricating composites into different operating systems is a solution to reduce the use of external toxic petroleum-based lubricants in sliding contacts in a way to help the environment and reduce energy dissipation in industrial components for strategies toward sustainability and energy efficiency.

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Section: Self-lubricated Aluminum Compositesmentioning

confidence: 99%

“…There are many techniques available to produce metal matrix composites [44,60,98]. Generally, two main processes used to fabricate self-lubricating aluminum composites are (a) solid state processing [76,78,82,[99][100][101][102] and (b) liquid state processing [32,61,63,64,66,80,90,103,104].…”

Section: Aluminum-graphite Compositesmentioning

confidence: 99%

Influences of graphite reinforcement on the tribological properties of self-lubricating aluminum matrix composites for green tribology, sustainability, and energy efficiency—a review

Omrani

Moghadam

Menezes

et al. 2015

Int J Adv Manuf Technol

134

View full text Add to dashboard Cite

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“…The major limitation of ceramic reinforcements is that they increase the hardness of the composites. Moreover, the wear resistance of the tribosystem is reduced because of an increase in the counterface wear [25][26][27]. However, the presence of ceramic reinforcements in the Al matrix is essential for maintaining the strength and stiffness of the composites.…”

Section: Introductionmentioning

confidence: 99%

Fabrication characteristics and tribological behavior of Al/SiC/Gr hybrid aluminum matrix composites: A review

Singh

2016

Friction

114

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Improvement in surface properties and retainment of bulk properties are essential requirements for the design of components for wear resistance applications. This paper summarizes various features of Al/SiC/Gr hybrid composites that can be employed in different tribological applications. The study has revealed that the processing route plays a significant role in obtaining a homogeneous structure of these composites. In powder metallurgy, the selection of sizes of the matrix and reinforcement powders is crucial, whereas the wettability between the reinforcement particles and molten alloy is a major challenge in liquid metallurgy. The incorporation of SiC particles increases the mechanical strength and wear performance of Al composites. However, ejection of these particles can reduce the wear performance of Al composites under severe conditions. The addition of Gr particles helps in the formation of a thick and extensive tribolayer on the wear surface. This layer reduces direct contact between the rubbing surfaces, thereby decreasing the wear rate under certain conditions. Morphological analysis of worn surfaces has confirmed that the hybrid composites exhibit superior wear properties than the pure Al alloy and the ceramic-reinforced composite. However, increase in the Gr content beyond a limiting value can deteriorate the tribological properties of these composites. Therefore, true optimization of a tribosystem (of the hybrid composite and counterface) can be achieved by selecting appropriate reinforcement contents.

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“…The literature survey presents a review of the published material available on the effect of various reinforcement types, their size and volume fraction, ageing behavior with Aluminium based MMCs are a combination of two phases, matrix and the reinforcement. Aluminium graphite composites for various compositions are prepared by using stir casting method [15], mechanical alloying (MI) and hot extrusion method [16] etc., and the specimens were tested for their hardness, tensile, wear and fracture properties etc. Mechanical characterization such as tensile strength and elongation experiments by using Universal Testing Machine (UTM) of Al/SiC has been reported [8] for varying mass fraction of SiCp with Aluminium.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation on fracture toughness of Al6061–graphite by using Circumferential Notched Tensile Specimens

Doddamani¹,

Kaleemulla²

2016

Frattura Ed Integrità Strutturale

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ABSTRACT. This paper presents the experimental work carried out on the fracture behavior of aluminium 6061 (Al6061) and graphite particulate composites. The required specimens are prepared using stir casting method with graphite proportions ranging from 3 to 12 % by weight. The fracture behavior of Al6061-graphite particulate composites produced using stir casting method, was investigated by conducting experiments on Universal Testing Machine (UTM). Circumferential Notched Tensile (CNT) specimens were utilized to evaluate the fracture toughness of the composites. From the experiment the fracture toughness KIC= 15.85MPa m 1/2 is obtained for Al6061-9% Graphite. Further, the experimental results revealed that, except 12% graphite, the fracture toughness of Al6061-graphite was observed to increases with an increase in weight percentage of graphite. The experimental results reinforce that Al6061-graphite particulate MMCs are suitable for automotive and aerospace applications requiring high fracture toughness apart from good wear resistance.

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Tribological characterization of Al7075–graphite composites fabricated by mechanical alloying and hot extrusion

Cited by 121 publications

References 33 publications

Influences of graphite reinforcement on the tribological properties of self-lubricating aluminum matrix composites for green tribology, sustainability, and energy efficiency—a review

Influences of graphite reinforcement on the tribological properties of self-lubricating aluminum matrix composites for green tribology, sustainability, and energy efficiency—a review

Fabrication characteristics and tribological behavior of Al/SiC/Gr hybrid aluminum matrix composites: A review

Experimental investigation on fracture toughness of Al6061–graphite by using Circumferential Notched Tensile Specimens

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