Simulations of microporosity in IN718 equiaxed investment castings

Sung, P. K.; Poirier, D. R.; Felicelli, Sergio D.; Poirier, E.; Ahmed, Anwar

doi:10.1016/s0022-0248(01)01380-x

Cited by 35 publications

(18 citation statements)

References 18 publications

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“…Considerable literature is available concerning the effect of alloying elements and processing variables on the high temperature mechanical performance and oxidation resistance of these products. However, data on the influence of the filling system is meager [1][2][3][4]. This is because the effect of the filling system on the quality of castings poured in vacuum has been assumed to be unimportant.…”

Section: Introductionmentioning

confidence: 99%

Filling system for investment cast Ni-base turbine blades

Campbell

2004

Journal of Materials Processing Technology

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Section: Introductionmentioning

confidence: 99%

Filling system for investment cast Ni-base turbine blades

Campbell

2004

Journal of Materials Processing Technology

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“…Simulation techniques, parametric or/and direct methods are usually apply to shape castings [26][27][28][29][30].…”

Section: Influence Of Cooling Rate On the γ′ Morphology And Size Distmentioning

confidence: 99%

Analysis of metallurgical aspects and their role in processing and performance of superalloys: A review

Raza

Ahmad

Manzoor

et al. 2017

J. Fundam and Appl Sci.

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Metallurgical processing factors like kinetic and thermodynamic parameters which are essential for modeling of γ′ phase precipitation have been studied. These parameters include γ′ solvus temperature, Gibbs free energy of dissociation of the γ matrix to form γ′, nucleation rate, effective diffusivity and interfacial energy. Nucleation methods and effect of cooling rate on the final phase structure have been analyzed. Co based superalloys have been studied as a potential and promising material for aerospace applications. Effect of microporosity on the mechanical properties of Superalloys has also been analyzed.

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“…However, the authors have not discussed about the prediction of the hot spots and porosity levels in the castings, which may deteriorate the fracture sensitive properties of the castings. Sung et al (2001) developed a finite element model to predict the regions where the gas pressure exceeds local pressure and hence gas porosity can potentially form in a rectangular plate casting by the IC process. The simulation of the formation of microporosity was studied with consideration of different variables including the mass transfer of hydrogen and nitrogen from the casting to the casting/mold gap, the final grain size, a grainshape parameter and the thickness of the plate casting.…”

Section: Solidification Modeling and Simulationmentioning

confidence: 99%