Study of the Effect of Nano-silica Particles on Resin-Bonded Moulding Sand Properties and Quality of Casting

Chate, Ganesh R.; Patel, G C Manjunath; Kulkarni, Raviraj M.; Vernekar, Pavan; Deshpande, Amruta; Parappagoudar, Mahesh B.

doi:10.1007/s12633-017-9705-z

Cited by 25 publications

(10 citation statements)

References 27 publications

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“…In GRA, all response variables are assigned equal weights, which may cause uncertainty in decision making. Therefore, PCA is employed to determine relative weights of quality responses [ 67 ]. In this research work, it is attempted to compare multi objective optimization performed by GRA and PCA and to validate results by confirmatory experiments.…”

Section: Resultsmentioning

confidence: 99%

An Integrated Approach of GRA Coupled with Principal Component Analysis for Multi-Optimization of Shielded Metal Arc Welding (SMAW) Process

et al. 2020

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Welding distortion is a critical issue as it leads to severe deterioration of structural integrity of welded work piece and dimensional precision. This study aims at studying the effects of shielded metal arc welding (SMAW) parameters on the evolution of mechanical properties, including tensile strength, impact toughness, and hardness, along with angular distortion on a welded joint from SA 516 grade 70. Such parameters are analyzed and optimized by employing the Taguchi method and Grey relational analysis. SA 516 grade 70 is commercially used for fabrication of storage tanks, boilers and pressure vessels. SMAW is investigated with three levels of root gap, groove angle, electrode diameter, and pre-heat temperature, which were varied on a butt joint in flat (1 G) position to determine their effects on response variables at room temperature. Nine experiments were designed using a Taguchi L9 orthogonal array, welded according to American Society of Mechanical Engineers (ASME) section IX, and samples were prepared and tested as per ASTM A 370. The Taguchi method and Grey relational analysis were employed to observe the most significant parameters and optimal levels that synergically yield improved responses. Results are validated by conducting confirmatory experiments that show good agreement with optimum results.

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Section: Resultsmentioning

confidence: 99%

An Integrated Approach of GRA Coupled with Principal Component Analysis for Multi-Optimization of Shielded Metal Arc Welding (SMAW) Process

et al. 2020

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“…Beyond the optimal limit, the addition of water could decrease the permeability as the majority of the space between the sand grains is occupied by free water [15][16] . Increasing the number of strokes could improve the mould hardness but affect both gas evolution and collapsibility [5] . Low ramming will reduce the strength and hardness of the mould [5] .…”

Section: Selection Of Moulding Sand Variables and Their Operating Levelsmentioning

confidence: 99%

“…Increasing the number of strokes could improve the mould hardness but affect both gas evolution and collapsibility [5] . Low ramming will reduce the strength and hardness of the mould [5] . In general, a low quantity of cow dung might occupy the radical space between the sand grains, and its adhesive nature could improve mould strength/hardness.…”

Section: Selection Of Moulding Sand Variables and Their Operating Levelsmentioning

confidence: 99%

“…Adding additives (sea coal, iron powder, phosphate, sawdust, nanometer material, wood powder, etc.) in moulding sand can improve the specific properties of moulding sand, which will result in high hot strength (ability to retain strength at high temperature) and restricting the metal penetration, and therefore, will improve the surface quality of castings [4][5][6] .…”

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confidence: 99%

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Performance analysis of cow dung as an eco-friendly additive material for sustainable moulding and casting

et al. 2019

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C lay bonded and chemical bonded sand moulds are commonly used in modern foundries for casting metal parts. Chemical based sand moulds will offer excellent design flexibility for the production of intricate shape parts. However, chemical binders will release the toxic gases that pollute the environment and cause serious threat to human health [1]. Furthermore, the strong and hard moulds obtained by chemical-based sand results in a poor collapsibility, which causes crack or hot tear casting defects [2, 3]. Therefore, modern foundries tend to use green

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“…Kumar et al [8] studied the gas-permeability of ceramic molds by passing compressed air through the samples and recorded the pressure drop. When permeability is one of the many aspects measured, researchers have used the simple permmeter [8,9]. In this work, permeability is calculated using a custom-made setup, where air is passed through a standard cylindrical sample, and the flow properties such as the pressure drop and velocity are measured [10].…”

Section: Introductionmentioning

confidence: 99%

On the Relation between the Gas-Permeability and the Pore Characteristics of Furan Sand

Sundaram

Svidró

et al. 2021

Materials

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Furan sand is one of the most commonly used chemically bonded molding materials in foundries across the world. It consists of a furfuryl alcohol-based resin and an acid-based liquid catalyst. When the molding material comes in contact with the molten metal, it undergoes a thermal shock accompanied by a certain release of volatile gases. In order to evacuate these gases, molds and cores should have optimal gas permeability values and proper venting by design. If the volatile compounds are not appropriately evacuated, they are prone to enter the melt before the first layer of solidified metal is formed which can lead to the formation of gas-related casting defects. Standard gas permeability measurements are commercially available tools used in the industry to compare and to quality control different sands, however, they only provide reference numbers without actual units. Permeability in a standard unit, m2, provides uniformity and helps the comparison of results from difference sources. In this paper, a new method using Darcy’s law (prevalent in earth sciences), was adapted to measure the gas-permeability of furan samples made of silica sand with various grain size distributions. The effect of grain size distribution on the gas-permeability of furan sand samples was studied. Gas-permeability values in m2 were then correlated with mercury-porosity measurement results to bring new light on the relation between pore size, pore volume and the permeability of molding materials.

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Study of the Effect of Nano-silica Particles on Resin-Bonded Moulding Sand Properties and Quality of Casting

Cited by 25 publications

References 27 publications

An Integrated Approach of GRA Coupled with Principal Component Analysis for Multi-Optimization of Shielded Metal Arc Welding (SMAW) Process

An Integrated Approach of GRA Coupled with Principal Component Analysis for Multi-Optimization of Shielded Metal Arc Welding (SMAW) Process

Performance analysis of cow dung as an eco-friendly additive material for sustainable moulding and casting

On the Relation between the Gas-Permeability and the Pore Characteristics of Furan Sand

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