Thermal hot spot prediction in high pressure die casting by determination of Chvorinovs rule shape constant

Marathe, Suraj R.; Quadros, Carmo

doi:10.1016/j.matpr.2021.03.606

Cited by 4 publications

(2 citation statements)

References 7 publications

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“…On the contrary, the cooling surfaces of two molds at hollow ingots formation give much more favorable solidification conditions. We conducted a comparative analysis of solidification conditions in different types of ingots by performing calculations of the total solidification time (TST) using the known Chvorinov's rule [45,46].…”

Section: Discussionmentioning

confidence: 99%

Electroslag Hollow Ingots for Nuclear and Petrochemical Pressure Vessels and Pipes

Medovar

Stovpchenko

Sybir³

et al. 2023

Metals

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The paper presents ground reasoning and results of experiments and modeling of heavy hollow ingot manufacturing using advanced electroslag technology. The requirements for ingots for huge diameter reactor pressure vessels include high density, homogeneity, and minimal segregation, which are very difficult to achieve by traditional casting. In the electroslag remelting process (ESR), hollow ingots form in between two copper water-cooled molds under effective heat removal. This improves the solidification pattern due to the shortening of a solidifying volume thickness more than twice compared with a solid ingot of the same diameter. The shallow liquid metal pool and narrow mushy zone at the ESR hollow ingot solidification assure their high metallurgical quality. Due to the dense and low segregation structure, ESR hollow ingots proved to be used for as-cast pipes and heavy wall billets for further forging. The results of a mathematical simulation within the range of simulated dimensions (the outer diameter up to 2900 mm, wall thickness up to 750 mm) also predict the favorable solidification pattern for thick-wall hollow ingots of big diameters. The analysis made and the modeling results provide a framework for scaling up the sizes of hollow ingots produced by ESR and widening their application for manufacturing heavy wall large diameter shells for nuclear and petrochemical industries. The higher reachable productivity of hollow ingot formation and lower capacity of power supply source than that for solid ingots of the same diameter and weight are also preconditions of their energy saving and cost-effective manufacturing.

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Section: Discussionmentioning

confidence: 99%

Electroslag Hollow Ingots for Nuclear and Petrochemical Pressure Vessels and Pipes

Medovar

Stovpchenko

Sybir³

et al. 2023

Metals

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“…Therefore, there always existed a slow heat transfer from melt to ceramic skeleton throughout the entire casting process. The final solidification position in the casting process, namely the hot spot, which originated from the uneven temperature gradient and uneven shrinkage during the solidification process, was likely to form shrinkage porosity defects due to the insufficient melt feeding [28,29]. In terms of the simulation results shown in Figure 6a, the hot spot could appear in the center of the SiC3D/Al composite.…”

Section: Solidification Process Analysismentioning

confidence: 96%

Numerical Simulation of Squeeze-Casting SiC3D/Al Ceramic Matrix Composites

Wang,

Zhang,

Feng

et al. 2024

Metals

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In this study, the filling and solidification processes of squeeze-casting SiC3D/Al composites were analyzed by the ProCAST simulation software (ver. 2018.0). A practical squeeze-casting experiment was conducted to verify the accuracy of the simulation results. A series of orthogonal experiments were conducted on the initial preheating temperature of various components to identify the optimal parameters in order to achieve better porosity and stress concentration values. According to the results and analyses, the preheating temperature of the mold was the most important determining factor. Under a pouring temperature of 700 °C, mold preheating temperature of 200 °C, and SiC skeleton preheating temperature of 600 °C, the maximum principal stress at the bottom of the products was decreased by about 41.9%, and the shrinkage volume inside the composite was decreased about by about 61.6%. Thus, by adjusting the initial preheating temperature of various components, the squeeze-casting SiC3D/Al composites could achieve better performance and fewer internal defects.

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