Effect of processing factors on the characteristics of centrifugal casting

Mohapatra, Shubhashree; Sarangi, Hrushikesh; Mohanty, U. K.

doi:10.1051/mfreview/2020024

Cited by 16 publications

(3 citation statements)

References 89 publications

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“…As mentioned earlier the temperature gradient in a casting system can be made stiff from a shallow one by adopting several means. This is illustrated in Figures 19 and 20 [16].…”

Section: Effect Of Temperature Gradient On the Feeding Range Of The Alloysmentioning

confidence: 83%

Solidification of Metals and Alloys

Mohanty¹,

Sarangi²

2021

Casting Processes and Modelling of Metallic Materials

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In order to analyse the process of solidification of metals and alloys critically, it is most pertinent to understand the different modes of nucleation and the uneven rates of growth throughout the melt. It is also important to take a note of the constraints in the growth process that definitely influence the crystal structure and the structure related properties of the casting. The freezing pattern of the liquid melt decides the feeding of the mould which is instrumental in producing a complete and compact casting. For pure metals and even in case of alloys with a narrow freezing range a well defined solid–liquid macro-interface exists. Here feeding of the solidifying casting is the easiest, by the common lowering of the liquid metal surface in the mould. However, in many instances, a well defined interface is not witnessed. The solid–liquid interface could be discrete and not continuous. Here process of feeding the solidification sites that witness considerable shrinkages, may become complicated. On grounds of above it is implied, the process of solidification constitutes an important aspects in the production of a defect free casting.

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“…As mentioned earlier the temperature gradient in a casting system can be made stiff from a shallow one by adopting several means. This is illustrated in Figures 19 and 20 [16].…”

Section: Effect Of Temperature Gradient On the Feeding Range Of The Alloysmentioning

confidence: 83%

Solidification of Metals and Alloys

Mohanty¹,

Sarangi²

2021

Casting Processes and Modelling of Metallic Materials

Self Cite

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“…At the initial solidification stage of centrifugal casting, the melt began to crystallise close to the inner wall of the mould under the action of centrifugal force. Due to the density difference between alloying elements and matrix elements, the solidification microstructure often presents a gradient of microstructure or composition under the action of centrifugal force, that is, centrifugal separation effect [14][15][16].…”

Section: Resultsmentioning

confidence: 99%

Ellipsoidal equiaxial grain of 7055 aluminium alloy in vacuum centrifugal casting

Yin

Qian

et al. 2023

Materials Science and Technology

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The 7055 aluminium alloy cast tube was prepared by vacuum centrifugal casting technology. The radial and axial microstructure of the alloy was observed by optical microscope and electron probe. The results showed that the as-cast microstructure is uniform and fine equiaxed, and intermetallic compounds are distributed at grain boundaries. In addition, the circumferential grain size and the number of intermetallic compounds were larger than that in the axial direction. The grains are ellipsoidal and equiaxed. This is the result of directional heat conduction, solid solubility migration and redistribution of solute during the solidification process of centrifugal casting. After homogenisation, the grains tend to be spherical equiaxed crystals, which is the result of different degrees of recrystallisation in the circumferential and axial directions.

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“…), was invented by Alfred Krupp in 1852 [13]. The method essence consists of the fact that the mould filling and the crystallisation of the casting takes place under the action of centrifugal forces [2,[14][15][16][17][18]. Depending on the location in space of the axis of rotation, centrifugal casting is carried out with a horizontal, vertical or inclined axis of rotation [19].…”

Section: Introductionmentioning

confidence: 99%

Influence of an Ageing Heat Treatment on the Mechanical Characteristics of Iron-Aluminium Bronzes with β-Transformation Obtained via Centrifugal Casting: Modelling and Optimisation

Maximov,

Duncheva,

Anchev

et al. 2023

Metals

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Aluminium bronzes possess a unique combination of high strength and wear and corrosion resistance in aggressive environments; thus, these alloys find wide application in marine, shipbuilding, aviation, railway, offshore platform applications and other fields. Iron-aluminium bronzes (IABs) are the cheapest and most widely used. When the aluminium content is above 9.4 wt%, IAB is biphasic (i.e., it undergoes β-transformation) and can be subjected to all heat-treatment types, depending on the desired operating behaviour of the bronze component. This article presents correlations (mathematical models) between the primary mechanical characteristics (yield limit, tensile strength, elongation, hardness and impact toughness) and the ageing temperature and time of quench at 920 °C in water of Cu-11Al-6Fe bronze, obtained using the centrifugal casting method. The microstructure evolution was evaluated depending on the ageing temperature and time changes. Overall, the research was conducted in three successive inter-related stages: a one-factor-at-a-time study, planned experiment, and optimisations. Four optimisation tasks, which have the greatest importance for practice, were formulated and solved. The defined multiobjective optimisation tasks were solved by searching for the Pareto-optimal solution approach. The decisions were made through a nondominated sorting genetic algorithm (NSGA-II) using QstatLab. The optimisation results were verified experimentally. Additional samples were made for this purpose, quenched at 920 °C in water and subjected to subsequent ageing with the optimal values of the governing factors (ageing temperature and time) for the corresponding optimisation task. The comparison of the results for the mechanical characteristics with the theoretical optimisation results presents a good agreement.

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Effect of processing factors on the characteristics of centrifugal casting

Cited by 16 publications

References 89 publications

Solidification of Metals and Alloys

Solidification of Metals and Alloys

Ellipsoidal equiaxial grain of 7055 aluminium alloy in vacuum centrifugal casting

Influence of an Ageing Heat Treatment on the Mechanical Characteristics of Iron-Aluminium Bronzes with β-Transformation Obtained via Centrifugal Casting: Modelling and Optimisation

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