Influences of Si and Mg contents on microstructures of Al–xSi–yMg functionally gradient composites reinforced with in situ primary Si and Mg2Si particles by centrifugal casting

Lin, Xuedong; Liu, Changming; Zhai, Yanbo; Kai, Wu

doi:10.1007/s10853-010-4874-9

Cited by 23 publications

(6 citation statements)

References 25 publications

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“…Mutual correlations exist between the solidification conditions, alloy compositions and heat treatment parameters. 3,6,7 Heat treatment studies performed on Al-Si-Cu and Al-Si-Mg alloys revealed a better age-hardening response for Al-Si-Mg alloy than for Al-Si-Cu alloy, which was confirmed through microhardness results and X-ray diffraction (XRD) analysis. 8…”

Section: Introductionmentioning

confidence: 79%

“…These alloys are used in a variety of automotive and aerospace components due to their good castability and fluidity properties, as well as a combination of high ductility, high specific strength, high corrosion and wear resistance. [1][2][3] A356 (Al-7Si), a hypo-eutectic alloy from the Al-Si-Mg system, is used widely in recent decades for vehicularengine block/head applications due to its excellent casting ability, high strength/weight ratio and excellent heat-treatable characteristics. 4,5 Cooling rate, modification and heat treatment are the three factors that influence the silicon morphology.…”

Section: Introductionmentioning

confidence: 99%

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Microstructure, mechanical properties and reciprocal dry sliding wear behaviour of as-cast and heat-treated TiN/Al-7Si functionally graded composite

Radhakrishnan

Radhika

2022

Proceedings of the Institution of Mechanical Engineers, Part B:

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This work explores the effect of T6 heat-treatment on the microstructure, mechanical properties and dry sliding linear reciprocating wear behaviour of Al-7Si/Titanium Nitride (TiN) centrifugally cast functionally graded composite. The 10 wt% TiN particle addition and subsequent eutectic Si spheroidisation due to heat treatment revealed an improvement in microhardness, tensile strength and wear resistance of heat-treated composite when compared to as-cast composite. Reciprocating wear analysis at varying applied loads and sliding distances revealed a combination of specimen micro-ploughing and abrasive particle action at low load and sliding distances, which was in stark contrast to the combination of abrasive and adhesive wear at higher loads and sliding distances. The surface was characterised by mechanically mixed layer formation due to tribo-oxidation, adhesive and delamination wear mechanisms. This composite can be utilised to replace traditional materials employed in reciprocating pump and compressor applications.

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Section: Introductionmentioning

confidence: 79%

Section: Introductionmentioning

confidence: 99%

Microstructure, mechanical properties and reciprocal dry sliding wear behaviour of as-cast and heat-treated TiN/Al-7Si functionally graded composite

Radhakrishnan

Radhika

2022

Proceedings of the Institution of Mechanical Engineers, Part B:

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“…The YL113 alloy (YZAl-11Si-3Cu, GB/T15115-2009) was used as the substrate for the all-aluminum engine block, with its specific components listed in Table 1, and the matrix In order to manufacture an all-aluminum engine, the hypereutectic Al-Si alloy materials (high-silicon aluminum alloy) with high specific strength, excellent thermal conductivity, and low thermal expansion coefficient was applied to replace the cast iron to manufacture the cylinder liner [6][7][8][9][10][11][12][13]. However, this material increases the manufacturing process and cost.…”

Section: Coating Spray Materials and Processmentioning

confidence: 99%

“…However, the usage of cast iron cylinder liners not only increases the overall weight and manufacturing cost of the engine, but also reduces the performance and safety due to the low thermal conductivity and the mismatched thermal expansion coefficient. In order to manufacture an all-aluminum engine, the hypereutectic Al-Si alloy materials (high-silicon aluminum alloy) with high specific strength, excellent thermal conductivity, and low thermal expansion coefficient was applied to replace the cast iron to manufacture the cylinder liner [6][7][8][9][10][11][12][13]. However, this material increases the manufacturing process and cost.…”

Section: Introductionmentioning

confidence: 99%

Microstructure, Phase Composition, Mechanical Properties and Tribological Properties of Plasma Sprayed Al-25Si Wear-Resistant Coatings

Peng¹,

Liu²,

Huang³

et al. 2022

Surfaces

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Owing to the light weight and high energy, the “All-aluminum engine” can reduce fuel consumption and pollutant emissions, showing a great significance in saving resources and protecting the environment, and becoming a research hotspot. However, the aluminum alloy cylinder liners have difficulty withstanding extremely harsh working conditions, such as strong friction and wear, making the engine extremely easy to damage. In this work, Al-25Si wear-resistant coating was deposited by inner hole supersonic plasma spraying technique to improve the wear resistance of the aluminum alloy cylinder liner. The microstructure, phase composition, mechanical properties and tribological properties were tested by SEM, XRD, tribological machine, etc. The results indicated that the coating exhibited an excellent bonding strength of 44.1 MPa, and the average hardness and average friction coefficient of the coating are 267.09 ± 14.85 HV0.2, and 0.20, respectively. The total wear amount, the wear scar width and the wear scar depth of the coating are 2.77 × 10−3 mm3, 654.3 μm and 8.95 μm, respectively, which showed that the coating can significantly improve the tribological properties of the “All-aluminum engine”. The wear mechanism of the coating was mainly interpreted by furrow cutting, extrusion and spalling in two-body abrasive wear, three-body abrasive wear and a small amount of oxidative wear.

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“…Using centrifugal casting technology, Lin X.D. et al fabricated the Al-xSi-yMg composite and the intrinsic relationships among alloying composition, volume fraction of primary particles and properties have been researched [3][4][5]. Also, the Al-Si-Ni composites tubes were prepared and one bilateral segregation appearance of primary particles was observed [6,7].…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Al-Based Composites Cylinder Reinforced with <i>In Situ</i> Si/Mg<sub>2</sub>Si Particles and the Research of its Bench Test

Lin

Liu

2017

MSF

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The centrifugal casting process was adopted to fabricate Al-30Si-8Mg composites tubes reinforced with in-situ particles, which was used to produce the cylinders used in 149cc engine by high pressure die casting. The relations between the microstructures along the radial direction and the hardness and wear resistance of the casting were researched. The internal surface of the cylinder was treated and a bench test for the engine was carried out. The results show that, 1) a large number of primary Si/Mg2Si particles are segregated and enriched in the inner layer of the Al-30Si-8Mg casting, while no particle is in the outer layer, and the maximum particle volume fraction is up to 31.9 vol. %; 2) the region which has more primary particles, the hardness value is higher, and the wear resistance is better as well in the casting; 3) the cylinder assembled on the air-cooled engine successfully passes through the endurance test for 200 hours, and the maximum output power and torque reach 8.18 KW and 10.77 N·m, respectively, while a slight scuffing occurs on the internal surface of the cylinder in the later phase of the test.

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Influences of Si and Mg contents on microstructures of Al–xSi–yMg functionally gradient composites reinforced with in situ primary Si and Mg2Si particles by centrifugal casting

Cited by 23 publications

References 25 publications

Microstructure, mechanical properties and reciprocal dry sliding wear behaviour of as-cast and heat-treated TiN/Al-7Si functionally graded composite

Microstructure, mechanical properties and reciprocal dry sliding wear behaviour of as-cast and heat-treated TiN/Al-7Si functionally graded composite

Microstructure, Phase Composition, Mechanical Properties and Tribological Properties of Plasma Sprayed Al-25Si Wear-Resistant Coatings

Fabrication of Al-Based Composites Cylinder Reinforced with <i>In Situ</i> Si/Mg<sub>2</sub>Si Particles and the Research of its Bench Test

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