Investigation of eutectic island formation in SX superalloys

N. Warnken; D. Ma; M. Mathes; I. Steinbach

doi:10.1016/j.msea.2005.09.067

Investigation of eutectic island formation in SX superalloys

N. Warnken^*, D. Ma, M. Mathes, I. Steinbach

^*Corresponding author for this work

Metallurgy and Materials

Research output: Contribution to journal › Article › peer-review

48 Citations (Scopus)

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Abstract

We investigated whether the nucleation of the eutectic islands in superalloy solidification occurs in the interdendritic bulk liquid or at the dendrite-melt interface. Directionally solidified samples of CMSX-4 and a model superalloy have been analysed by means of light and electron microscopy and by EBSD measurements. For some samples, the solid-melt interface has been revealed by an artificial bubble technique. Additionally, thermodynamic calculations on phase formation and nucleation work as well as phase-field simulations have been performed, using ThermoCalc and MICRESS. The results indicate a kind of epitaxial nucleation mechanism at the solid-liquid interface of the primary γ dendrites.

Original language	English
Pages (from-to)	267-271
Number of pages	5
Journal	Materials Science and Engineering A
Volume	413-414
DOIs	https://doi.org/10.1016/j.msea.2005.09.067
Publication status	Published - 15 Dec 2005

Keywords

EBSD
Eutectic island
Microstructure simulation
Nucleation
Superalloy

ASJC Scopus subject areas

Materials Science(all)

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Warnken_et_al_Investigation_of_eutectic_island_formation_in_SX_superalloys_Materials_Science_and_Engineering_A_2005
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title = "Investigation of eutectic island formation in SX superalloys",

abstract = "We investigated whether the nucleation of the eutectic islands in superalloy solidification occurs in the interdendritic bulk liquid or at the dendrite-melt interface. Directionally solidified samples of CMSX-4 and a model superalloy have been analysed by means of light and electron microscopy and by EBSD measurements. For some samples, the solid-melt interface has been revealed by an artificial bubble technique. Additionally, thermodynamic calculations on phase formation and nucleation work as well as phase-field simulations have been performed, using ThermoCalc and MICRESS. The results indicate a kind of epitaxial nucleation mechanism at the solid-liquid interface of the primary γ dendrites.",

keywords = "EBSD, Eutectic island, Microstructure simulation, Nucleation, Superalloy",

author = "N. Warnken and D. Ma and M. Mathes and I. Steinbach",

year = "2005",

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day = "15",

doi = "10.1016/j.msea.2005.09.067",

language = "English",

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T1 - Investigation of eutectic island formation in SX superalloys

AU - Warnken, N.

AU - Ma, D.

AU - Mathes, M.

AU - Steinbach, I.

PY - 2005/12/15

Y1 - 2005/12/15

N2 - We investigated whether the nucleation of the eutectic islands in superalloy solidification occurs in the interdendritic bulk liquid or at the dendrite-melt interface. Directionally solidified samples of CMSX-4 and a model superalloy have been analysed by means of light and electron microscopy and by EBSD measurements. For some samples, the solid-melt interface has been revealed by an artificial bubble technique. Additionally, thermodynamic calculations on phase formation and nucleation work as well as phase-field simulations have been performed, using ThermoCalc and MICRESS. The results indicate a kind of epitaxial nucleation mechanism at the solid-liquid interface of the primary γ dendrites.

AB - We investigated whether the nucleation of the eutectic islands in superalloy solidification occurs in the interdendritic bulk liquid or at the dendrite-melt interface. Directionally solidified samples of CMSX-4 and a model superalloy have been analysed by means of light and electron microscopy and by EBSD measurements. For some samples, the solid-melt interface has been revealed by an artificial bubble technique. Additionally, thermodynamic calculations on phase formation and nucleation work as well as phase-field simulations have been performed, using ThermoCalc and MICRESS. The results indicate a kind of epitaxial nucleation mechanism at the solid-liquid interface of the primary γ dendrites.

KW - EBSD

KW - Eutectic island

KW - Microstructure simulation

KW - Nucleation

KW - Superalloy

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DO - 10.1016/j.msea.2005.09.067

M3 - Article

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SN - 0921-5093

VL - 413-414

SP - 267

EP - 271

JO - Materials Science and Engineering A

JF - Materials Science and Engineering A

ER -

Investigation of eutectic island formation in SX superalloys

Abstract

Keywords

ASJC Scopus subject areas

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