Journal ArticleDOI
The effect of liquid metal cooling on thermal gradients in directional solidification of superalloys: Thermal analysis
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In this article, the influence of casting and baffle geometry, mold thickness as well as withdrawal speed on solidification conditions and resulting microstructure was examined for the case of simple cylindrical castings and found that the nature of the baffle has a stronger effect than the different mechanism of heat dissipation.About:
This article is published in Journal of Materials Processing Technology.The article was published on 2013-12-01. It has received 30 citations till now. The article focuses on the topics: Directional solidification & Liquid metal.read more
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Directional solidification of Ni-based superalloy castings: Thermal analysis
TL;DR: In this article, a numerical simulation of Directionally Solidified Ni-based superalloy castings was performed with the use of ProCAST software, for withdrawal rates of 1, 3 and 5mm/min in order to predict cooling rate, axial and transverse temperature gradients, solidification rate, height of mushy zone, shape of liquidus isotherm and its location relative to thermal baffle along the casting height.
Journal ArticleDOI
Effect of Processing Parameters and Shape of Blade on the Solidification of Single-Crystal CMSX-4 Ni-Based Superalloy
TL;DR: In this article, the effect of mold withdrawal velocity, heater and pouring temperatures and the thickness of blade root on the solidification parameters and shape of the liquidus isotherm as well as microstructure of single-crystal CMSX-4 nickel-based superalloy, manufactured by the Bridgman method, has been analyzed.
Journal ArticleDOI
Comparative Investigation of the Downward and Upward Directionally Solidified Single-Crystal Blades of Superalloy CMSX-4
TL;DR: In this paper, the downward directional solidification (DWDS) process was used for directionally solidifying single-crystal blades of Ni-base superalloys (CMSX-4).
Journal ArticleDOI
Quantitative analysis of withdrawal rate on stray grain formation in the platforms of a Ni-Based single crystal dummy blade
TL;DR: In this article, the effect of withdrawal rate on the thermal profile development and the macrostructural evolutions of Ni-base single crystal (SX) dummy blades was investigated based on simulations and experiments.
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Single Crystal Casting with Fluidized Carbon Bed Cooling: A Process Innovation for Quality Improvement and Cost Reduction
TL;DR: In this paper, a new process, Fluidized Carbon Bed Cooling (FCBC), has been developed and is now being optimized in a prototype casting unit with 10 kg pouring weight.
References
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Thermophysical properties of high temperature solid materials
TL;DR: In this paper, a general description is given of the format and method of presenting data, methods and techniques for the collection, evaluation, processing, and retrieval of information in the preparation of the work entitled, "Thermophysical Properties of High Temperature Solid Materials".
Journal ArticleDOI
Dendrite growth at the limit of stability: tip radius and spacing
Wilfried Kurz,D.J. Fisher +1 more
TL;DR: In this article, a general framework is proposed to relate tip radius, interface undercooling and primary arm spacing in alloy dendrite growth, and all the growth morphologies developed between the limiting morphology at low and at high velocity are described to a first approximation, using an ellipsoid of revolution.
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Directional solidification of large superalloy castings with radiation and liquid-metal cooling: A comparative assessment
Andrew John Elliott,Tresa M. Pollock,Sammy Tin,W. T. King,S. C. Huang,Michael Francis Xavier Gigliotti +5 more
TL;DR: A columnar-grain variant of single-crystal RENE N4 has been directionally solidified over a range of conditions in order to assess the possible benefits of the use of liquid metal-enhanced cooling for large cross-sectional castings as discussed by the authors.
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The Effect of Casting Conditions on the High-Cycle Fatigue Properties of the Single-Crystal Nickel-Base Superalloy PWA 1483
M. Lamm,M. Lamm,Robert F. Singer +2 more
TL;DR: In this paper, different solidification conditions are employed to produce sets of single-crystal samples with different primary dendrite arm spacings, i.e., 600 μm, 400 μm and 250μm.
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Liquid metal cooling: A new solidification technique
A. F. Giamei,J. G. Tschinkel +1 more
TL;DR: In this paper, a new and highly efficient directional solidification process using liquid metal as a coolant is described, and a laboratory version of this process is reviewed in detail, and the selection of a coolent is also discussed.