Effect of Thermophysical Properties and Processing Conditions on Primary Dendrite Arm Spacing of Nickel-Base Superalloys – Numerical Approach

Martin M. Franke; Michael Hilbinger; Astrid Heckl; Robert F. Singer

doi:10.4028/www.scientific.net/AMR.278.156

Paper Titles

Change in Microstructure at Grain Boundaries with Creep Deformation of Polycrystalline Nickel-Based Superalloy IN-100 at 1273K
p.132

Change in Gamma Prime Morphology and Dislocation Substructures of Single Crystal Nickel-Based Superalloy, CMSX-4, Pre-Crept at 1273K-400MPa with Simple Aging
p.138

The Effect of Lattice Misfit on Deformation Mechanisms at High Temperature
p.144

Prediction of Mechanical Behaviour in Ni-Base Superalloys Using the Phase Field Model of Dislocations
p.150

Effect of Thermophysical Properties and Processing Conditions on Primary Dendrite Arm Spacing of Nickel-Base Superalloys – Numerical Approach
p.156

Liftime Optimization of Hot Forged Aerospace Components by Linking Microstructural Evolution and Fatigue Behaviour
p.162

Comparison between Microstructure Evolution in IN718 and ATI Allvac® 718Plus^TM – Simulation and Trial Forgings
p.168

On the Oxidation Resistance of Nickel-Based Superalloys
p.174

Modeling of Precipitation Kinetics of TCP-Phases in Single Crystal Nickel-Base Superalloys
p.180

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Effect of Thermophysical Properties and Processing Conditions on Primary Dendrite Arm Spacing of Nickel-Base Superalloys – Numerical Approach

Abstract:

This paper presents the results of an investigation on the interrelationship between thermophysical properties, processing conditions and primary dendrite arm spacing for a nickel-base superalloy. The research was realized for CMSX-4, directionally solidified in a Bridgman furnace. For a systematic, fast and cost-efficient investigation numerical finite element models were applied. The numerical model, composed of thermophysical material data, geometric data and boundary conditions, was calibrated and experimentally validated. Microstructural parameters of the castings were determined for a broad range of processing conditions and varying thermophysical properties in order to study general influences. Withdrawal speed, furnace temperature, enthalpy of fusion, solidification range, heat conductivity and specific heat were varied accordingly. The primary dendrite arm spacing is predominantly influenced by withdrawal speed and furnace temperature, but shows only a weak dependency on thermophysical properties.

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Periodical:

Advanced Materials Research (Volume 278)

Pages:

156-161

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.278.156

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Online since:

July 2011

Authors:

Martin M. Franke, Michael Hilbinger, Astrid Heckl, Robert F. Singer

Keywords:

Investment Casting, Numerical Modeling, Primary Dendrite Arm Spacing, Solidification Rate, Superalloy, Temperature Gradient

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Creative Commons CC BY 4.0

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