Heat treatment and wear characteristics of Al/SiCp composites fabricated by duplex process

Kim, Sug Won; Lee, Ui Jong; Han, Sang Won; Kim, Dong Keun; Ōgi, Keisaku

doi:10.1016/s1359-8368(03)00081-7

Cited by 60 publications

(16 citation statements)

References 11 publications

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“…This is in agreement with the results of other investigators [13,14]. In these cases, and as stated in [15], the high strain energy for the periphery of particles increases the hardness. Moreover, the difference between the coefficient of thermal expansion (CTE) values of matrix and ceramic particles generates thermally induced residual stresses and increases the dislocations density [16].…”

Section: Effect Of Treatments On Hardnesssupporting

confidence: 93%

Grain Refinement of Aluminum-Based Nanocomposites

El-Labban

2014

The International Conference on Applied Mechanics and Mechanica

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Grain refinement of an aluminum alloy was carried out by adding 0.6 wt.% Al-Ti5-B1 master alloy to the aluminum alloy melt at 720 °C for a holding time of 10 minutes. 2 wt.% Al 2 O 3 nanoparticles were added to the base melt and mechanically stirred to produce the nanocomposite. The two types of additions were used in case of the combined treatment. A considerable grain refinement of the aluminum alloy was obtained by the addition of Al-Ti5-B1 to its melt. A nanocomposite of fine matrix grains was also produced. A modified nanocomposite of more refined matrix grains and homogeneous microstructure was produced by application of the combined treatment. Both hardness and wear resistance of the aluminum alloy were increased by grain refinement. Greater increases in these properties were obtained in case of nanocomposite. Remarkable improvements in these properties were achieved in the case of grain refined nanocomposite.

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Section: Effect Of Treatments On Hardnesssupporting

confidence: 93%

Grain Refinement of Aluminum-Based Nanocomposites

El-Labban

2014

The International Conference on Applied Mechanics and Mechanica

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“…Takviye malzemeler arasında partikül tipi takviyelerin diğer takviye tiplerine göre bazı önemli avantajları vardır. Yapılan çalışmalar [11][12][13][14] incelendiğinde, partikül takviyeli malzemelerin üretim prosedürlerinin daha basit ve nispeten daha ucuz olduğu, takviyenin maliyetinin nispeten düşük ve kompozit malzeme için özelliklerinin izotropik olduğu görülmektedir. Ayrıca, bir metal matris içine katılan seramik parçacıkları, kompozitin mekanik ve tribolojik özelliklerini iyileştirmesinin yanında korozyon önleyici davranışını da büyük ölçüde artırabilir [15,16].…”

Section: Gi̇ri̇ş (Introduction)unclassified

Mekanik Alaşımlama Metodu ile Üretilen Al-4.5Cu/SiC Kompozitin Termal ve Mikroyapısal Özelliklerinin İncelenmesi

Okumuş

Bülbül

2020

Gazi Üniversitesi Fen Bilimleri Dergisi Part C: Tasarım Ve Teknoloji

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In this study, Al4.5Cu/SiC alloy matrixed composites are produced by mechanical alloying. The effect of the amount of reinforcement and milling time on the thermal and microstructural properties of the composites produced was investigated by differential thermal analysis (DTA), X-ray diffraction (XRD), and scanning electron microscopy (SEM). Also, the microhardness of the pressed and sintered composites was investigated. As a result, the mechanical alloying process led to increased hardness in the microstructure by welding the matrix with homogeneously dispersed reinforcement. Figure A. Microhardness of Al4.5Cu/SiC compositesPurpose: In this study, it was aimed to design and produce high-quality Al-4.5Cu/SiC alloybased composite to be used in many sectors, especially in the maritime, automotive, electrical, and aerospace industries, and to examine its properties.Theory and Methods: Al4.5Cu/SiC alloy matrix composites, in which as reinforcement SiC is mixed into the Al4.5Cu alloy-matrix at a weight ratio of 10-20%, are produced by grinding for 5 and 10 hours with mechanical alloying method. In mechanical alloying processes, the ball-topowder weight ratio is 10:1, and the rotation speed is set to 350 rpm. The composite samples pressed under 250 MPa were sintered in an argon-controlled atmosphere furnace at 700 o C for 1 hour. Hardness measurements were carried out with a Shimadzu microhardness tester using a load of 100 g for 10 seconds. The microstructure properties of the produced powder composites were analyzed using XRD and SEM, and their thermal behavior was analyzed using DTA.Results: It was observed that while the SiC ratio in the composite was low, solid solutions were formed, and as the SiC ratio increased, agglomerations occurred. Endothermic peaks indicating that Al2Cu, α-Al and SiC doped Al4.5Cu solid solution phases melted during continuous heating with DTA. As the SiC ratio and grinding time increased, it was observed that the composite had more homogeneous, irregularly shaped or spherical particles, and shrinkage in particle sizes. In addition, as the milling time and SiC ratio increased, it was found that the sample hardness increased due to the decrease in crystallite size and deformation hardening, and the maximum hardness value was approximately 260 HV. Conclusion:The Al4.5Cu/SiC composites is successfully fabricated by mechanical alloying and sintering. During the production process, no undesirable intermetallic phase occurs in the composites. As the milling time increases, the increase in microhardness indicates an improvement in the mechanical properties of the composites.

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“…Numerous dislocations stimulate the increase of hardness. The more silicon carbide particles are introduced into the aluminium matrix, the higher is the dislocation density and the resultant hardness of the composite [20,21]. Fig.…”

Section: Hardness Evolutionmentioning

confidence: 99%

Microstructure Characterization of SiC Reinforced Aluminium and Al4Cu Alloy Matrix Composites

Leszczyńska-Madej¹,

Wasik²,

Madej³

2017

Archives of Metallurgy and Materials

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A conventional powder metallurgy method (PM) was used to produce Al-SiC and Al4Cu alloy matrix composites with 2.5, 5, 7.5 and 10 wt% of SiC particles. Two different sizes of the reinforcing phase particles were applied to determine their effect on composite microstructure. The sintering process was carried out at 600°C under nitrogen atmosphere, and its consequence was the appearance of aluminium nitrides in composite microstructure acting as an additional strengthening phase. The composites were next re-pressed and re-sintered (2p2s) under the same conditions. The main aim of this article was to examine the microstructure of the SiC reinforced Al and Al4Cu alloy matrix composites. To achieve this goal and characterize the sintered materials, scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray diffraction (XRD) techniques were used.

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Heat treatment and wear characteristics of Al/SiCp composites fabricated by duplex process

Cited by 60 publications

References 11 publications

Grain Refinement of Aluminum-Based Nanocomposites

Grain Refinement of Aluminum-Based Nanocomposites

Mekanik Alaşımlama Metodu ile Üretilen Al-4.5Cu/SiC Kompozitin Termal ve Mikroyapısal Özelliklerinin İncelenmesi

Microstructure Characterization of SiC Reinforced Aluminium and Al4Cu Alloy Matrix Composites

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