Effects of particle size and distribution on the mechanical properties of SiC reinforced Al–Cu alloy composites

Wang, Zhangwei; Song, Min; Sun, Chen; He, Yuehui

doi:10.1016/j.msea.2010.11.028

Cited by 174 publications

(52 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The micron size reinforced metal matrix composites can achieve good strength; however, the ductility of the material reduces. The micron size particles have less surface area to volume ratio and act as micro-crack initiators in the matrix, which leads to a remarkable decrement in the ductility of the composites [3][4][5][6]. Many researchers proved that the ceramic nano-sized particle reinforced metal matrix composites attained good strength with similar ductility of the metal matrix [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Dry sliding wear behaviour of ultrasonically-processed AA6061/SiCp nanocomposites

Reddy¹,

Krishna²,

Rao³

2017

Int. J. Automot. Mech. Eng.

View full text Add to dashboard Cite

The present study focused on the wear performance of AA6061/ SiCp (1, 1.5 and 2 wt. %) of nanocomposites at dry sliding condition. The nanocomposite specimens were fabricated through ultrasonic assisted stir casting technique. The wear experiments were conducted under normal atmospheric conditions using a pin-on-disc apparatus. Three different applied normal loads on nanocomposite pin (10 N, 15 N, and 20 N); at various sliding velocities of (1 m/s, 1.5 m/s, and 2 m/s); and at sliding distances of (1000 m, 2000 m, and 3000 m) were considered. The influences of applied normal load on nanocomposite pin, wt. % of SiCp reinforcement particles, sliding velocity, and sliding distance on both friction coefficient and wear loss were studied. The changes of wear loss and friction coefficient with varying applied normal loads, sliding velocities, and sliding distances were plotted. It was observed that the wear loss increased linearly with increasing sliding distance and sliding velocity. This was due to the increase of oxidation layer on the pin surface. The average friction coefficient at sliding velocity 1 m/s for 1 wt. % of SiCp, 1.5 wt. % of SiCp, and 2 wt. % of SiCp reinforced nanocomposites at sliding distance 3000 m, at 20 N normal loads was 0.29, 0.43, and 0.46, respectively. The average friction coefficient at 2 m/s sliding velocity for the same load and sliding distance was 0.26, 0.27, and 0.28, respectively. The increase of SiCp reinforcement in the matrix increased the friction coefficient due to its cubic crystal structure. The increase of sliding velocity and sliding distances reduced the friction coefficient. The worn surfaces of the samples were examined using SEM and EDX analyses. SEM micrograph analysis of the wear surfaces of the nanocomposites exhibited the abrasion wear and oxidative wear with severe plastic deformation. The shallower scratches, circular grooves, and deeper grooves were identified at different conditions on the worn surfaces.

show abstract

Section: Introductionmentioning

confidence: 99%

Dry sliding wear behaviour of ultrasonically-processed AA6061/SiCp nanocomposites

Reddy¹,

Krishna²,

Rao³

2017

Int. J. Automot. Mech. Eng.

View full text Add to dashboard Cite

show abstract

“…Alaşım ve kompozit numunelerin mikroyapı görüntülerde çatlak oluşumuna rastlanmazken gözenek ve topaklanmalar tespit edilmiştir (Şekil 5). Kompozitlerde tespit edilen bu gözenek ve topaklanmalar mekanik özellikleri zayıflatmaktadır [7,[21][22][23]. Kompozit numuneye ait SEM imajı ve çizgisel EDX analizi Şekil 6'da verilmiştir.…”

Section: şEkilunclassified

“…Genel aşınma prensibi olarak matris yapıya eklenen partiküllerin neden olduğu sertlik artışı, kompozitlerin aşınma dayanımını arttırırken aşınma kayıplarını azaltmıştır. Alüminyum matrisli kompozitlerin aşınma direnciyle ilgili benzer sonuçları ortaya koyan çeşitli çalışmalar mevcuttur [23,32,33]. Ayrıca, yaşlandırma işlemleri sonrası ulaşılan sertlik değerleri dikkate alındığında, T6 ısıl işlemli numuneler T73 ısıl işlemli numunelere göre daha iyi aşınma performansı göstermiştir.…”

Section: şEkil 8 Isıl Işlem Ve Partikül Içeriğine Bağlı Sertlik Değiunclassified

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

Matik¹,

Tanattı²

2017

Journal of Polytechnic

View full text Add to dashboard Cite

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.

show abstract

“…If the particle/matrix interfacial bonding strength is high, particle fracture usually happens during deformation. On the other hand, if the particle/matrix interfacial bonding strength is weak, decohesion between the SiC particles and the aluminum matrix will occur prior to the particle fracture [43][44][45][46][47][48][49]. Fig.…”

Section: -3-mechanical Properties and Fractography Analysismentioning

confidence: 99%

Stir casting process for manufacture of Al–SiC composites

et al. 2015

View full text Add to dashboard Cite

Stir casting is an economical process for the fabrication of aluminum matrix composites. There are many parameters in this process, which affect the final microstructure and mechanical properties of the composites. In this study, micron-sized SiC particles were used as reinforcement to fabricate Al-3 wt% SiC composites at two casting temperatures (680 and 850 °C) and stirring periods (2 and 6 min). Factors of reaction at matrix/ ceramic interface, porosity, ceramic incorporation, and agglomeration of the particles were evaluated by scanning electron microscope (SEM) and high-resolution transition electron microscope (HRTEM) studies. From microstructural characterizations, it is concluded that the shorter stirring period is required for ceramic incorporation to achieve metal/ceramic bonding at the interface. The higher stirring temperature (850 °C) also leads to improved ceramic incorporation. In some cases, shrinkage porosity and intensive formation of Al4C3 at the metal/ceramic interface are also observed. Finally, the mechanical properties of the composites were evaluated, and their relation with the corresponding microstructure and processing parameters of the composites was discussed. AbstractStir casting is an economical process for fabricating aluminium matrix composites. There are

show abstract

Effects of particle size and distribution on the mechanical properties of SiC reinforced Al–Cu alloy composites

Cited by 174 publications

References 34 publications

Dry sliding wear behaviour of ultrasonically-processed AA6061/SiCp nanocomposites

Dry sliding wear behaviour of ultrasonically-processed AA6061/SiCp nanocomposites

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

Stir casting process for manufacture of Al–SiC composites

Contact Info

Product

Resources

About