Review on centrifugal casting of functionally graded materials

In this research, SiC/Al A413.1 functionally graded materials (FGMs) were fabricated by the vibrating centrifugal solid particle method (VCSPM), and the effects of the SiC particles on the microstructure and thermo-mechanical properties of an A413.1 aluminium alloy were investigated. The benefits of a vibration during centrifugal casting of FGMs are illustrated. After designing and fabricating the centrifugal casting machine, cylindrical FGM specimens were produced using the centrifugal solid particle method (CSPM) and VCSPM. This study used SiC particles with an average particle size from 50 to 62 μm as reinforcements to fabricate A413.1-10 wt% SiC functionally gradient composites at three annular mould speeds (900–1500 and 2100 rpm) and with or without a vibration of the mould. The Brinell hardness was measured; the yield strength (YS), ultimate tensile strength (UTS) and Young’s modulus (E) were determined by tensile testing; the density was determined by the Archimedes method; and the thermal expansion coefficients were measured with a dilatometer. A comparison of the samples produced by the conventional method and VCSPM shows a significant reduction in the porosity and an increase in the distribution gradient of the reinforcing particles for the VCSPM case. It can be concluded that in both processes, the mechanical and thermal properties improved in most cases by moving from the inner radius to the outer radius because of the movement of particles towards the outer radius from the centrifugal force. The results also show that the use of a vibration dramatically increased the rate and speed of migration of gas bubbles towards the inner radius, and the mechanical properties (hardness, YS, UTS and E) improved by moving from the inner to outer radius due to an increase in the percentage of silicon carbide particles. Upon increasing the velocity and using the VCSPM, the slope of these changes becomes steeper than those for the vibration-free mode and at low rotation speeds.

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Fabrication of Al–Si–Mg functionally graded materials tube reinforced with in situ Si/Mg2Si particles by centrifugal casting

Composites Part B Engineering ◽

10.1016/j.compositesb.2012.09.001 ◽

2013 ◽

Vol 45 (1) ◽

pp. 8-21 ◽

Cited By ~ 30

Author(s):

Xuedong Lin ◽

Changming Liu ◽

Haibo Xiao

Keyword(s):

Functionally Graded Materials ◽

Centrifugal Casting ◽

Functionally Graded ◽

Graded Materials

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Fabrication of Functionally Graded Materials by Introducing Wolframium Carbide Dispersed Particles During Centrifugal Casting and Examination of FGM's Structure

Procedia Engineering ◽

10.1016/j.proeng.2015.12.111 ◽

2015 ◽

Vol 129 ◽

pp. 816-820 ◽

Cited By ~ 10

Author(s):

I.V. Chumanov ◽

A.N. Anikeev ◽

V.I. Chumanov

Keyword(s):

Functionally Graded Materials ◽

Centrifugal Casting ◽

Functionally Graded ◽

Graded Materials ◽

Dispersed Particles

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Characterization of Aluminum Alloy–Silicon Carbide Functionally Graded Materials Developed by Centrifugal Casting Process

Applied Sciences ◽

10.3390/app11041625 ◽

2021 ◽

Vol 11 (4) ◽

pp. 1625

Author(s):

Ioan Milosan ◽

Tibor Bedő ◽

Camelia Gabor ◽

Daniel Munteanu ◽

Mihai Alin Pop ◽

...

Keyword(s):

Aluminum Alloy ◽

Functionally Graded Materials ◽

Centrifugal Casting ◽

Metallic Copper ◽

Casting Process ◽

Aluminum Carbide ◽

Functionally Graded ◽

Graded Materials ◽

Sic Particles ◽

Molten Aluminum Alloy

The continuous development of modern industries rises the necessity for functionally graded materials. This research starts from the consideration that the incorporation of SiC particles in the molten aluminum alloy can be difficult due to the very low wettability of SiC particles. In order to increase their wettability, SiC particles were covered with a layer of metallic copper. The incorporation of SiC particles into the aluminum alloy mass was performed by centrifugal casting. The secondary hypoeutectic Al-Si alloy used in this study was elaborated within the crucible of a resistors heated furnace. The metallic coating of SiC particles, in addition to the effect of increasing their wettability by molten metal, also has a role in preventing the formation of aluminum carbide in case of heating above 700 °C. A great amount of attention was paid to the parameters used during the centrifugal casting process. The results showed that adjusting the proportion of SiC particles within the composite allows us to obtain values of the thermal expansion coefficient within previously established limits. The present work demonstrates that the coating of SiC particles covered with a thin layer of metallic Cu creates the conditions to easily incorporate them into the molten Al mass, thus obtaining FGMs with controlled properties.

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Characterization of Fabricated FG Pipe with Natural Fiber-Flyash-Epoxy using Centrifugal Casting

International Journal of Innovative Technology and Exploring Engineering - Special Issue ◽

10.35940/ijitee.k1437.0981119 ◽

2019 ◽

Vol 8 (11) ◽

pp. 734-741 ◽

Cited By ~ 3

Keyword(s):

Fly Ash ◽

Functionally Graded Materials ◽

Natural Fiber ◽

Centrifugal Casting ◽

Functionally Graded ◽

Powder Materials ◽

Optimized Design ◽

Cylindrical Pipe ◽

Graded Materials ◽

Banana Stem

This research presents the design of fabrication technique for hollow pipe made up of functionally graded materials and its characterization. In the first part, a horizontal centrifugal casting model is designed and developed using CATIA package. After getting an optimized design the fabrication work is performed in workshop. Different powder materials (Banana stem fiber, Jute fiber and Fly ash) are prepared by considering different chemical treatment and physical process. Different powder sizes (300µ, 150µ, 75µ, 53µ, 45µ) are considered to fabricate current functionally graded cylindrical pipe by altering their weight percentage. The different weight percentages (5%, 7.5%, 10%, 12.5%, 15% of Banana stem and 2.5%, 5%, 7.5%, 10%, 12.5% of Fly Ash) of constituents are considered for fabricating FGM cylindrical pipe. By altering the constituent of FGM material composition, twelve numbers of various functionally graded materials (FGMs) pipes are fabricated. In the second part, the material characterization is performed using different testing machines in Laboratories. Mechanical properties (Compression test and Micro hardness test) and physical properties (Density test, Water absorption test and thermal conductivity test) are investigated. Furthermore, the microstructures of the fabricated FGNF pipes are examined using Scanning Electron Microscope (SEM).

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