Analysis of the high growth-rate transition in Al–Si eutectic solidification

Hosch, T.; England, Luke; Napolitano, Ralph E.

doi:10.1007/s10853-009-3747-6

Cited by 75 publications

(23 citation statements)

References 20 publications

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“…Cooling rate and thermal gradient which influence dendritic growth and crystal orientation and structure are directly affected by the withdrawal rate. [40,41] The cooling rate is controlled by the withdrawal speed of the mold to the cooling medium. [42] Results of Li et al [43] revealed that more complex shapes require low withdrawal rates.…”

Section: Withdrawal Ratementioning

confidence: 99%

“…Withdrawal rate is defined as the speed at which the mold is withdrawn from the heating to the cooling section. Cooling rate and thermal gradient which influence dendritic growth and crystal orientation and structure are directly affected by the withdrawal rate . The cooling rate is controlled by the withdrawal speed of the mold to the cooling medium .…”

Section: Introductionmentioning

confidence: 99%

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Grain Selection and Crystal Orientation in Single‐Crystal Casting: State of the Art

Raza

Wasim

Hussain

et al. 2019

Crystal Research and Technology

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The properties of single‐crystal superalloys depend highly upon crystallographic orientation and the selection of single crystal (SX) in directional solidification (DS) process. The assessment of SX selection and crystallographic orientation determines the mechanical properties of the casting. Generally, it is considered that the deviation from [001] orientation should be less than 10° for better mechanical properties. This article provides a quantitative literature review analyzing the experimental results of 30 papers that studied the effects of process parameters on crystal orientation and grain selection in SX‐casting process. Key parameters that control the SX casting during DS process include spiral selector parameters, starter block parameters, withdrawal rate, pouring temperature, and ceramic mold temperature. The analysis in this research provides a strong evidence to assist the standard operating range of each parameter. A lack of focus in the literature on alloys is found. A framework based on the key parameters is also proposed in this review.

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Section: Withdrawal Ratementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Grain Selection and Crystal Orientation in Single‐Crystal Casting: State of the Art

Raza

Wasim

Hussain

et al. 2019

Crystal Research and Technology

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“…One option is to tune the solidification parameters, e.g., growth velocity and thermal gradient, in directional experiments. 4,23 The resulting microstructure can vary from flake-like to fibrous depending on the growth conditions and the volume fractions of the constitutive elements, see Refs. 3,11, and 12 for further details.…”

Section: B Modification Of Degenerate Eutecticsmentioning

confidence: 99%

Chemical modification of degenerate eutectics: A review of recent advances and current issues

Moniri

Shahani

2018

J. Mater. Res.

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“…For example, Al-Si alloy, cast iron (gray and white), and so on are the most common industrial eutectics due to their good casting, wetting, and mechanical properties [1][2][3][4]. Ceramics eutectic composites have become a good choice for the high-temperature structural materials, since the brittleness of monolithic ceramics can be overcome by eutectic solidification [5].…”

Section: Introductionmentioning

confidence: 99%

“…One of the general guiding principles for quantitative composition design of bulk metallic glasses is to find the alloys with the lowest liquidus temperature near the eutectic point [6]. Therefore, modeling of eutectic growth is important for not only the control of eutectic microstructures [1,2], but also the selection of potential glass-forming systems [7].…”

Section: Introductionmentioning

confidence: 99%

Kinetics of triple-junctions in eutectic solidification: a sharp interface model

2014

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The kinetics of triple-junctions (TJs) in eutectic solidification is modeled by the thermodynamic extremum principle (TEP). It consists of two parts. First, TJs as the interaction of interfaces follow the interface kinetics according to which the temperature and concentration at the TJs are determined. This interface part of TJ kinetics is closely related to the eutectic point in the kinetic phase diagram. Second, TJs have their specific kinetics according to which their morphology (e.g., the contact angles in two dimensions) is determined. Using a new solution of solute diffusion in liquid, the TJ kinetics is incorporated into the current lamellar eutectic growth model. The model is applicable to the concentrated alloy systems and can be extended to any kind of eutectics. Simulation results of the rapid solidification of a lamellar Ni 5 Si 2 -Ni 2 Si (c-d) eutectic show that both parts of TJ kinetics can play important roles in eutectic solidification and need to be considered to improve the current eutectic theory.

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Analysis of the high growth-rate transition in Al–Si eutectic solidification

Cited by 75 publications

References 20 publications

Grain Selection and Crystal Orientation in Single‐Crystal Casting: State of the Art

Grain Selection and Crystal Orientation in Single‐Crystal Casting: State of the Art

Chemical modification of degenerate eutectics: A review of recent advances and current issues

Kinetics of triple-junctions in eutectic solidification: a sharp interface model

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