The Experts below are selected from a list of 27 Experts worldwide ranked by ideXlab platform
M Prashanth - One of the best experts on this subject based on the ideXlab platform.
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the optimization of squeeze Casting process Parameter for aa2219 alloy by using the taguchi method
Materials Today: Proceedings, 2019Co-Authors: Ak Karthik, S A Srinivasan, R. Karunanithi, M PrashanthAbstract:Abstract The squeeze Casting process have huge potential to produce excellent smooth surface finish profile and have a capability to produce near net product. The squeeze Casting is a combination process of forming and forging with a single stage operation without porosity. An attempt is made to optimize the process variables of squeeze Casting Parameter such squeeze pressure load, die and melt temperature using the L9 orthogonal array with three different levels in order to determine the S/N ratio for density and hardness which is considered as response of the squeeze Casting operation. Taguchi analysis performed on the response of squeeze Casting in order to determine the most significant process Parameter effecting on hardness and density. The Regression equation was devolved to perform a confirmatory test. The Squeeze Casting process Parameter optimized for AA2219 alloy at squeeze pressure 650 MPa, die pre heating temperature 225°c and melt temperature 700°C which produced better mechanical response and metallography structure. The microstructure of squeeze casted sample was analysed along the radial direction with help of an optical microscope. Microstructure evaluation conforms the presence of fine grains which can be obtained only at the optimized process Parameter.
L Katgerman - One of the best experts on this subject based on the ideXlab platform.
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the effect of ramping Casting speed and Casting temperature on temperature distribution and melt flow patterns in the sump of a dc cast billet
Materials Science and Engineering A-structural Materials Properties Microstructure and Processing, 2005Co-Authors: D G Eskin, L KatgermanAbstract:Abstract The interpretation of experimental results obtained upon direct-chill (DC) Casting frequently requires knowledge of the shape and position of liquidus and solidus isotherms and of the flow patterns in the billet sump. Computer simulations for the steady-state Casting conditions are usually used to obtain such information, although experiments are frequently performed under transient Casting conditions, e.g. at a ramping Casting speed in order to promote hot tearing, which obviously results in a deviation from the steady-state condition. The first goal of this work is to examine by modelling the differences in temperature distribution and flow patterns in the billet sump occurring in the steady-state and under transient Casting conditions (caused by Casting speed ramping) and to assess the implications of such differences for the structure and defect formation. The second goal is to evaluate the effect of the other important Casting Parameter, Casting temperature, on the temperature and flow patterns during DC Casting. To achieve these two goals, the concept of a hybrid model proposed in [C.M. Oldenburg, F.J. Spera, Numer. Heat Transfer, Part B 21 (1992) 217–229] is employed, in which the so-called coherent solid fraction contour divides the two-phase region into the slurry region and the mushy zone. Good spatial resolution of the two-phase region in the calculations is achieved by unstructured meshing, which improve the accuracy of the calculation. The calculation results are discussed and compared with the results of previously reported experiments.
Ak Karthik - One of the best experts on this subject based on the ideXlab platform.
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the optimization of squeeze Casting process Parameter for aa2219 alloy by using the taguchi method
Materials Today: Proceedings, 2019Co-Authors: Ak Karthik, S A Srinivasan, R. Karunanithi, M PrashanthAbstract:Abstract The squeeze Casting process have huge potential to produce excellent smooth surface finish profile and have a capability to produce near net product. The squeeze Casting is a combination process of forming and forging with a single stage operation without porosity. An attempt is made to optimize the process variables of squeeze Casting Parameter such squeeze pressure load, die and melt temperature using the L9 orthogonal array with three different levels in order to determine the S/N ratio for density and hardness which is considered as response of the squeeze Casting operation. Taguchi analysis performed on the response of squeeze Casting in order to determine the most significant process Parameter effecting on hardness and density. The Regression equation was devolved to perform a confirmatory test. The Squeeze Casting process Parameter optimized for AA2219 alloy at squeeze pressure 650 MPa, die pre heating temperature 225°c and melt temperature 700°C which produced better mechanical response and metallography structure. The microstructure of squeeze casted sample was analysed along the radial direction with help of an optical microscope. Microstructure evaluation conforms the presence of fine grains which can be obtained only at the optimized process Parameter.
Aspiyansyah Aspiyansyah - One of the best experts on this subject based on the ideXlab platform.
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effect of squeeze Casting Parameter process melt temperature die temperature and al 3 22 si on microstructure hardness and tensile strength in thin wall Casting
Suara Teknik: Jurnal Ilmiah, 2010Co-Authors: Aspiyansyah AspiyansyahAbstract:px; "> < Penelitian ini bertujuan untuk mengetahui pengaruh temperatur tuang dan temperatur cetakan terhadap struktur mikro dan kekerasan pada pengecoran squeeze (direct squeeze Casting) paduan Al-6,04%Si. Paduan dilebur pada dapur krusibel dan dituang pada temperatur 665°C, 775°C dan 855°C, pada cetakan yang berbentuk die-punch yang dipanaskan pada temperatur 220°C, 275°C dan 330°C. Tekanan diberikan sebesar 135 MPa untuk menekan logam cair yang ada pada cetakan. Struktur mikro diamati menggunakan mikroskop optik dan sifat kekerasan diuji menggunakan pengujian kekerasan Vickers. Hasil pengujian menunjukkan peningkatan temperatur tuang dan temperatur cetakan berpengaruh terhadap kekerasan dan struktur mikro. Kekerasan menurun dengan kenaikan temperatur tuang, peningkatan temperatur cetakan menyebabkan nilai kekerasan menurun dan struktur silikon semakin kasar. Kata kunci: pengecoran squeeze, kekerasan dan struktur mikro
ł Gondek - One of the best experts on this subject based on the ideXlab platform.
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cooling rate evaluation during solidification in the suction Casting process
Journal of materials research and technology, 2020Co-Authors: Tomasz Koziel, Krzysztof Pajor, ł GondekAbstract:Abstract In this work, axial cooling rates during solidification in the Fe-25Ni (wt.%) suction-cast alloy were evaluated based on cellular spacing measurements. Good agreement of the experimental results with the 20/{d(cm)}2 relationship was observed for the standard water-cooling system temperature of 17 ± 1 °C. The importance of this Casting Parameter is reported for the first time. A linear decrease in the cooling rate with increasing water-cooling system temperature is demonstrated and at least 20% lower values are expected for a temperature increase by 10 °C compared to standard conditions. Furthermore, the cooling rate exponentially decreases with increasing rod diameter for all water-cooling system temperatures. A new expression for cooling rates during solidification, taking into account the Casting Parameter (WCST expressed in K), i.e. C R = 10 - 0.0059 ⋅ W C S T + 4.9746 { d ( m m ) } 0.0195 ⋅ W C S T - 3.6351 , is proposed. The reliability and benefits of this formula have been demonstrated by Casting the Zr50Cu40Al10 glass-forming alloy at various water-cooling system temperatures.