Influence of B4C particle reinforcement on mechanical and machining properties of Al6061/B4C composites

Karabulut, Şener; Karakoç, Halil; Çıtak, Ramazan

doi:10.1016/j.compositesb.2016.07.006

Cited by 142 publications

(40 citation statements)

References 19 publications

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“…Substantial research has been undertaken on machining processes and surface generation in ultraprecision machining of MMCs. Karabulut et al [7] present an experimental investigation on the surface roughness in micro milling of B 4 C/Al MMCs. In this study, the best surface roughness can be observed at high milling speed, and the lowest feed rate under dry cutting conditions on Al6061 reinforced with 15 wt% B 4 C. Karabulut [8] also contributes to the optimization of surface roughness in Al 2 O 3 MMC milling process.…”

Section: Introductionmentioning

confidence: 99%

An experimental investigation on surface generation in ultraprecision machining of particle reinforced metal matrix composites

Niu

Cheng

2019

Int J Adv Manuf Technol

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Ultraprecision machining of metal matrix composites (MMCs) is observed as a scientific challenge, due to their hard-to-machine property and often the poor surface finish. This paper presents an experimental investigation on surface generation in ultraprecision machining of Al/B 4 C/50p MMCs. The machining trials using straight flute polycrystalline diamond (PCD) tools are conducted on a high precision micro milling machine. Side milling is adopted under varied cutting conditions. Metrology assessments on the workpiece surface roughness, topography, texture and defects/features are undertaken using a ZYGO 3D surface profiler and a scanning electron microscope (SEM). Experimental results indicate that process parameters and their contributions play essential roles in the machining process. By applying the optimal process parameters, e.g. cutting speed of 188.496 m/min, feed rate of 10 μm/rev and axial depth of cut of 150 μm, a better surface generation with surface roughness Ra < 20 nm can be obtained in ultraprecision machining of Al/B 4 C/50p particulate MMCs.

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Section: Introductionmentioning

confidence: 99%

An experimental investigation on surface generation in ultraprecision machining of particle reinforced metal matrix composites

Niu

Cheng

2019

Int J Adv Manuf Technol

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“…Her iki yaşlandırma işleminde de, matris yapıya ilave edilen partikül miktarının artışı, dağılım sertleşmesi mekanizması ile kompozitin sertlik değerlerinde artışa neden olmuştur. Kompozit malzemelerde artan sert faz içeriği kompozitin sertliğinde artış meydana getirdiği çeşitli çalışmalarda da rapor edilmiştir [13,[25][26][27][28][29][30]. Ancak, kompozitlerin sertliği yalnızca partikül içeriğine bağlı olmayıp, gözenek miktarı, şekli ve boyutu ile takviye elemanı boyutu, matristeki dağılımı ve topaklanması gibi birçok faktöre de bağlıdır [26].…”

Section: şEkil 7 T6 and T73 ıSıl Işlemli Numunelerin Sem Görüntüleriunclassified

Sıcak Ekstrüze Edilmiş AA7075-Sicp Kompozitlerin Tribolojik Karakteristiklerine Isıl İşlemin Etkisi

Matik¹,

Tanattı²

2017

Journal of Polytechnic

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Sıcak ekstrüze edilmiş AA7075-Sicp kompozitlerin tribolojik karakteristiklerine ısıl işlemin etkisi Effect of heat treatments on tribological characteristics of hot-extruded AA7075-Sicp composites Yazar(lar) (Author(s)): Ulaş MATİK, Kübra TANATTIBu makaleye şu şekilde atıfta bulunabilirsiniz (To cite to this article): Matik U. ve Tanattı K., "Sıcak ekstrüze edilmiş AA7075-sicp kompozitlerin tribolojik karakteristiklerine ısıl işlemin etkisi", Politeknik Dergisi, 20(4): 807-814, (2017). Politeknik Dergisi, 2017; 20 (4) : 807-814 Journal of Polytechnic, 2017; 20 (4) ÖZToz metal kompaktların sıcak ekstrüzyonu ile üretilen ve farklı oranlarda 32 µm boyutlu SiC partiküller ile takviye edilen AA7075 Al matrisli kompozitlerin mikroyapı, sertlik ve tribolojik performansına T6 ve T73 ısıl işlemlerinin etkisi incelendi. Bu amaçla, soğuk olarak preslenmiş farklı SiC partikül içeriğine sahip AA7075 toz metal kompaktlar 480 °C'de, 12 mm çaplı çubuklar halinde ekstrüze edildi. T6 ve T73 ısıl işlemlerinin uygulandığı ekstrüze edilmiş numunelerin mikroyapı, sertlik ve tribolojik karakteristikleri tarama elektron mikroskobu (SEM), enerji dağınımlı x-ray analizör (EDX), brinell sertlik ve adhesif aşınma test ve analizleri ile incelendi. Deneysel sonuçlar, SiC partikül içeriğinin artmasına bağlı olarak kompozitin sertlik ve aşınma direncinin de arttığını göstermektedir. Ayrıca, T6 ısıl işlemli numunelerin T73 ısıl işlemli numunelere göre daha iyi sertlik, sürtünme ve aşınma performansı gösterdiği tespit edildi.Anahtar Kelimeler: AA7075, kompozit, ekstrüzyon, aşınma, sertlik. Effect of Heat Treatments on Tribological Characteristics of Hot-Extruded AA7075-SiC p Composites ABSTRACTThe effect of T6 and T73 tempers on microstructure, hardness and tribological performance of hot-extruded reinforced with 32 µm sized SiC particles reinforced AA7075 Al matrix composites produced by hot-extrusion of powder metal compacts was investigated. For this purpose, the cold pressed AA7075 powder metal compacts with various SiC contents were extruded into 12 mm rod bars at 480 °C. The microstructure, hardness and tribological characteristics of T6 and T73 tempered samples were examined with scanning electron microscopy (SEM), energy dispersive x-ray analyzer (EDX), brinell hardness and adhesive wear tests. The results showed that the hardness and wear resistance of composites increases depending on the increase of SiC particle content. It was also determined that T6 tempered samples showed better hardness, friction and wear performance compared to T73 tempered samples.

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“…The MMC machining process and the associated surface roughness, subsurface damage and tool wear have been extensively studied experimentally as well. The optimal machining conditions for particle reinforced MMCs have been the topic of most research recently [12][13][14]. Manna and Bhattacharyya [15] proposed a Taguchi method-based approach in investigating MMCs turning processes which indicates the influence of cutting speed, feed and depth of cut is more or less equal to that on the surface roughness (Ra); depth of cut and feed have more influence on the maximum peak-to-valley roughness height (Rt) comparing to the cutting speed.…”

Section: Introductionmentioning

confidence: 99%

Investigation on the material removal and surface roughness in ultraprecision machining of Al/B4C/50p metal matrix composites

Niu

Cheng

2019

Int J Adv Manuf Technol

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Metal matrix composites (MMCs) are increasingly applied in various engineering industries because of their distinct physical and mechanical properties. While the precision machining of MMCs is less understood due to their complex microstructure and poor machinability, a comprehensive scientific understanding on their machining mechanics and the associated surface generation mechanisms is of great importance particularly for industrial scale applications of MMCs. This paper presents a simulation and experimental-based holistic investigation on cutting mechanics, material removal and surface roughness in ultraprecision machining of MMCs. B 4 C/Al2024 is selected as the targeted MMC material in this research. The thermal-mechanical-tribological integrated modelling and analysis are presented to investigate the effects of cutting speed, feed rate and depth of cut (DOC) on the material removal, chip formation mechanics and surface generation process. The simulation results indicate that the machined surface roughness in precision machining of particle reinforced MMCs can be reduced by increasing the cutting speed and decreasing the depth of cut. The surface flow waviness decreases, which contributes to a higher surface quality, while machining with a smaller feed rate. The well-designed machining trials are conducted under the same cutting conditions and process variables as those in simulations, which perform a good agreement with simulation results.

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Influence of B4C particle reinforcement on mechanical and machining properties of Al6061/B4C composites

Cited by 142 publications

References 19 publications

An experimental investigation on surface generation in ultraprecision machining of particle reinforced metal matrix composites

An experimental investigation on surface generation in ultraprecision machining of particle reinforced metal matrix composites

Sıcak Ekstrüze Edilmiş AA7075-Sicp Kompozitlerin Tribolojik Karakteristiklerine Isıl İşlemin Etkisi

Investigation on the material removal and surface roughness in ultraprecision machining of Al/B4C/50p metal matrix composites

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