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Journal ArticleDOI

Machinability studies on Al 7075/BN/Al2O3 squeeze cast hybrid nanocomposite under different machining environments

04 Mar 2018-Materials and Manufacturing Processes (Informa UK Limited)-Vol. 33, Iss: 5, pp 587-595
TL;DR: In this article, dry machining and minimum quantity lubrication (MQL) are used to reduce the usage of cutting fluid during machining. But, they are not suitable for outdoor machining due to their high energy consumption.
Abstract: Enforcement of stricter environmental policies demands alternative methods that could reduce the usage of cutting fluid during machining. Thus, dry machining and minimum quantity lubrication (MQL) ...
Citations
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Journal ArticleDOI
TL;DR: Particulate-reinforced metal matrix composites are of particular interest because of their ease of fabrication, low cost, and isotropic properties as mentioned in this paper, and Friction Stir Processing offers a promising alter...
Abstract: Particulate-reinforced metal matrix composites are of particular interest because of their ease of fabrication, low cost, and isotropic properties. Friction stir processing offers a promising alter...

64 citations

Journal Article
TL;DR: In this paper, a tensile test on Al-based composite materials strengthened with commercially available BN nanoparticles (BNNPs) was carried out and the results showed that a 50% increase in tensile strength was achieved compared with pristine Al.
Abstract: Fabrication of high strength yet light and low cost composite materials with good mechanical properties at room and elevated temperatures is a challenge that metallurgy and materials science communities are facing for many years, and no “dream material” has been developed so far. The primary goal of this study was to fabricate, characterize, and to carry out tensile tests on Al-based composite materials strengthened with commercially-available BN nanoparticles (BNNPs). The composites were fabricated by spark plasma sintering (SPS) technique. The structures of powder mixtures and composite materials, as well as their fracture surfaces, were studied by scanning and transmission electron microscopy. The influence of BNNPs content (0.5, 1.5, 3, 4.5, 6, and 7.5 wt%) and holding times (5, 60, and 300 min) at 600 °C during SPS on the tensile strength was investigated. A maximum increase in strength was observed for Al-based composites with 4.5 wt% of BNNPs. The sample demonstrated a 50% increase in tensile strength compared with pristine Al. Although the tensile tests performed at 300 °C revealed that the tensile strength became 20% lower than the strength at room temperature, it was, however, still 75% higher compared with that of the pure Al at 300 °C. In addition, at 300 °C the Al–BNNPs composites demonstrated a much higher value of yield stress, about 115 MPa, which is 190% higher than that of pure Al at the same temperature. The damping properties of Al–BNNPs composites were evaluated by temperature dependent internal friction (TDIF) measurements. The obtained results are discussed based on structural analysis and the TDIF data.

49 citations

Journal ArticleDOI
TL;DR: In this paper, the effects of yttria dispersion and interfacial bonding by ball milling technique on the performance of a 0.5-wt% Yttria nanoparticle reinforced 7075 aluminum alloy composite were examined.

44 citations

Journal ArticleDOI
TL;DR: A methodology is presented for the optimization of an FFBP-NN and the application of the Taguchi Design of Experiments (TDE) to predict the surface roughness in various cut depths during laser cutting of thin thermoplastic plates.

27 citations

Journal ArticleDOI
TL;DR: An overview of various reinforcement materials used for the fabrication of aluminum or its alloy matrix based hybrid nanocomposites is presented in this paper, where several future scopes of research in the area of aluminum/alloy matrix-based hybrid nano-composites are discussed.
Abstract: Aluminum or its alloys are widely used in automobile, aerospace, and marine due to their low density, good ductility, low cost, corrosion resistance etc. However, aluminum has several pit falls viz. poor strength, abrasion and wear resistance etc. These pit fall of aluminum can be improve by reinforcement of nanomaterials in the pure metal or alloy. Various types of nanomaterials can be used for the fabrication of light-weight aluminum/alloy matrix nanocomposites for high specific strength, improved wear and abrasion property, better corrosion resistance etc. Recently, there is a significant research interest for the fabrication of nanocomposites by using more than one reinforcing materials. This article presents an overview of various reinforcement materials used for the fabrication of aluminum or its alloy matrix based hybrid nanocomposites. Brief overview of metal matrix and specifically aluminum matrix nanocomposites are included in the manuscript. Various processing routes for the fabrication of hybrid nanocomposites are explained. Properties of hybrid nanocomposites with respect to the nano-reinforcement types, reinforcement concentration, morphology and microstructure are discussed. Further, potential applications and future trends of aluminum or its alloy matrix hybrid nanocomposites are presented. Finally, the article has been concluded with several future scopes of research in the area of aluminum/alloy matrix based hybrid nanocomposites.

22 citations

References
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01 Jan 1993
TL;DR: In this paper, the authors describe the properties of micromechanisms and the mechanics of failure of failure in the context of process-based characterization of microma. But they do not discuss their application.
Abstract: Processing Microstructure and characterisation Microma=echanics and mechanics of deformation Damage micromechanisms and mechanics of failure Applications.

558 citations

Journal ArticleDOI
TL;DR: In this article, the authors present an up-to-date review of progress and benefits of different routes for fabrication and machining of composites and conclude that polycrystalline tools and diamond-coated tools are best suitable for various conventional machining operations.
Abstract: Intrinsically smart, metal matrix composites (MMCs) are lightweight and high-performance materials having ever expanding industrial applications. The structural and the functional properties of these materials can be altered as per the industrial demands. The process technologies indulged in fabrication and machining of these materials attract the researchers and industrial community. Hybrid electric discharge machining is a promising and the most reliable nonconventional machining process for MMCs. It exhibits higher competence for machining complex shapes with greater accuracy. This paper presents an up-to-date review of progress and benefits of different routes for fabrication and machining of composites. It reports certain practical analysis and research findings including various issues on fabrication and machining of MMCs. It is concluded that polycrystalline tools and diamond-coated tools are best suitable for various conventional machining operations. High speed, small depth of cut and low feed ra...

251 citations


"Machinability studies on Al 7075/BN..." refers background in this paper

  • ...The conventional materials are being replaced with aluminium based metal matrix composites (MMC) in automotive, aerospace and sports good industries due to their enhanced mechanical properties such as high stiffness, better wear and creep resistance.([1]) Improved properties of composites are achieved by the incorporation of hard ceramic particles in the base matrix....

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Journal ArticleDOI
TL;DR: In this article, the authors reviewed various minimum quantity lubrication (MQL) methods used by various machining processes for different materials and highlighted the future work directions for research in this area.
Abstract: In the pursuit toward achieving dry cutting, air machining, minimum quantity lubrication (MQL), and cryogenically cooled machining are the stepping stones. Nevertheless, machining is always accompanied by certain difficulties, and hence none of these methods has provided a complete solution. Hence, this article reviews various MQL methods used by various machining processes for different materials. It also highlights the future work directions for research in this area.

208 citations


"Machinability studies on Al 7075/BN..." refers background in this paper

  • ...In MQL technique, the lubricant mist is causing a protective oxide layer on the interface which lowers the frictional force and resulting in better machinability of materials and reduces the chances of abrasive wear.([37]) This is illustrated in Fig....

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Journal ArticleDOI
TL;DR: In this article, the effect of artificial aging on the machinability of 6061 Al-alloy was investigated for the as-received, solution heat treated and then aged (SHTA) conditions.

192 citations


"Machinability studies on Al 7075/BN..." refers background in this paper

  • ...This leads to are duction in the contact area and thereby reduced cutting force.([33,34,36]) Hexagonal boron nitride, a well-known solid lubricant has a lamellar structure consisting of a stack of hexagonal sheets with strong covalent bonds and weak Vander Waals forces between the planes holding them together....

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Journal ArticleDOI
TL;DR: In this article, the influence of cutting speed, depth of cut, and feed rate on surface roughness during machining of 7075 Al alloy and 10 wt.% SiC particulate metal-matrix composites was investigated.
Abstract: In the present study, an attempt has been made to investigate the influence of cutting speed, depth of cut, and feed rate on surface roughness during machining of 7075 Al alloy and 10 wt.% SiC particulate metal-matrix composites. The experiments were conducted on a CNC Turning Machine using tungsten carbide and polycrystalline diamond (PCD) inserts. Surface roughness of 7075Al alloy with 10 wt.% SiC composite during machining by tungsten carbide tool was found to be lower in the feed range of 0.1 to 0.3 mm/rev and depth of cut (DOC) range of 0.5 to 1.5 mm as compared to surface roughness at other process parameters considered. Above cutting speed of 220 m/min surface roughness of SiC composite during machining by PCD tool was less as compared to surface roughness at other values of cutting speed considered. Wear of tungsten carbide and PCD inserts was analyzed using a metallurgical microscope and scanning electron microscope. Flanks wear of carbide tool increased by a factor of 2.4 with the increase of cutting speed from 180 to 240 m/min at a feed of 0.1 mm/rev and a DOC of 0.5 mm. On the other hand, flanks wear of PCD insert increased by only a factor of 1.3 with the increase of cutting speed from 180 to 240 m/min at feed of 0.1 mm/rev and DOC 0.5 mm.

185 citations


"Machinability studies on Al 7075/BN..." refers methods in this paper

  • ...Bhushan et al.([22]) executed the turning Al 7075 composite reinforced with 10 wt% SiC (particle size: 20–40 μm) on a...

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  • ...Bhushan et al.[22] executed the turning Al 7075 composite reinforced with 10 wt% SiC (particle size: 20–40 µm) on a CNC turning center using tungsten carbide and polycrystalline diamond (PCD) inserts....

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