Understanding Melt Flow Behavior for Al-Si Alloys Processed Through Vertical Centrifugal Casting

Shailesh, Rao A.; Tattimani, Mahantesh S.; Rao, Shrikantha S.

doi:10.1080/10426914.2015.1019093

Cited by 15 publications

(6 citation statements)

References 9 publications

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“…Some studies have put the optimum speed of rotation in centrifugal casting operation between 1200 and 1500 r/min. 22,24 The microstructure of both the cylindrical and bucket cast was observed to show the following at the speed of 1200 r/min: changing of large primary Si into needle-shaped eutectic Si near the surface, long needle-shaped eutectic Si transformed into fine primary Si and the formation of fine grain.…”

Section: Microstructurementioning

confidence: 97%

Improving the surface properties of a Pelton turbine bucket via centrifugal casting technique

Ebhota

Karun

Inambao

2017

Advances in Mechanical Engineering

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This study examines the possibility of fabricating a complex, non-cylindrical, Pelton turbine bucket by centrifugal casting technique. Oil hardening non-shrinking die steel material was selected for the permanent mould production, machined with computer numerical control and heat treated to a hardness of 432 BHN. Aluminium alloys, A390 and A390-5%Mg, were considered as the Pelton turbine bucket materials, cast and characterised. The effects of centrifugal casting technique and thermal treatment on the mechanical properties and corrosion resistance of A390 and A390-5%Mg alloys were studied. A hardness of 150 BHN (maximum) was recorded near the inner surface of the bucket and 157 BHN (maximum) was recorded at the outer periphery of the cylindrical cast. It was observed that A390-5%Mg by gravity casting shows higher corrosion resistance than the A390 alloy. Furthermore, the specimen from the outer zone of the circular cast shows a higher corrosion resistance than the specimen from the inner periphery.

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Section: Microstructurementioning

confidence: 97%

Improving the surface properties of a Pelton turbine bucket via centrifugal casting technique

Ebhota

Karun

Inambao

2017

Advances in Mechanical Engineering

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“…Normally silicon is added as a secondary phase material to improve the wear resistance and seizure. The investigation of wear of Al-Si alloys has already been carried out principally on dry sliding conditions by some earlier authors 7,16,17 .…”

Section: Hardness Value and Tensile Testsmentioning

confidence: 99%

“…Friction stir processing is a valuable process to process the microstructure of Al alloys thereby enhancing the mechanical properties 8,9 . The existence of primary Si particles in hyper eutectic or near eutectic Al-Si alloys offers exceptional wear resistance 10,17 . The fine-grain particle formation affects the tribological properties of the exterior layer 11,12 .…”

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confidence: 99%

A Study to Determine Optimum Speed to Produce the High-Quality Castings for Al-17%Si Alloy in a Vertical Centrifugal Casting Machine

Tattimani,

Maheswar,

Reddy

et al. 2024

jmmf

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The rotational speeds of moulds in a typical vertical centrifugal machine are found to greatly affect the resulting quality of cast tubes as seen through multiple parameters such as finishing texture strength etc. The dependence of the quality of mold on the speed can be attributed to the movement of molten metal, which in turn, is dictated by the speed of rotation. The present work is an effort to experimentally demonstrate this feature. The Alloy used in the work was Al-17%Si. The speeds of interest that were used for experimentation ranged from a minimum of 600 Revolutions Per Minute (RPM) to a maximum of 1200 Revolutions Per Minute (RPM). The results of the experiment were very affirmative towards the fact that the best quality can indeed be obtained for the said range of speeds. Further, a few experiments, beyond this range of speed, showed strikingly low-quality molds characterized by features such as coarse grain, low mechanical strength, and wear properties.

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“…The thermal conductivity of moulding sand significantly affects casting microstructure and mechanical properties [79][80][81][82][83][84][85]. The high cooling rate of casting reduces solidification time, grain size, and dendrite arm spacing, and the density of the grains increases [86].…”

Section: Ferrochrome Slagmentioning

confidence: 99%

Challenges and Future Prospective of Alternative Materials to Silica Sand for Green Sand Mould Casting: A Review

Sadarang

Nayak

Panigrahi

2021

Trans Indian Inst Met

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Near-net shape casting having complex geometry is manufactured through the sand casting process. However, day by day, the availability of natural or synthetic silica sand has been decreasing and increasing the production cost of sand casting components. Therefore, there is a need to look into low-cost and readily available alternative materials to substitute the commercial-grade silica sand for the sand mould casting process. The constituent of silica sand is primarily silica (SiO 2 ), Al 2 O 3 , and Fe 2 O 3 . The major constituents of industrial wastes such as fly ash, blast furnace slag, ferrochrome slag, stone dust, and red mud have SiO 2 , Al 2 O 3 , and Fe 2 O 3 . Therefore, industrial wastes may be used individually or combined with silica sand at a different ratio to substitute the commercialgrade silica sand in green mould castings. Researchers and scientists have evaluated the suitability of industrial wastes and local riverbed sand as an alternative material for green sand mould castings. The present review summarizes the advantages and constraints of using industrial wastes and local riverbed sand as an alternative to green sand mould casting process.

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Understanding Melt Flow Behavior for Al-Si Alloys Processed Through Vertical Centrifugal Casting

Cited by 15 publications

References 9 publications

Improving the surface properties of a Pelton turbine bucket via centrifugal casting technique

Improving the surface properties of a Pelton turbine bucket via centrifugal casting technique

A Study to Determine Optimum Speed to Produce the High-Quality Castings for Al-17%Si Alloy in a Vertical Centrifugal Casting Machine

Challenges and Future Prospective of Alternative Materials to Silica Sand for Green Sand Mould Casting: A Review

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