Phase-field simulation with the CALPHAD method for the microstructure evolution of multi-component Ni-base superalloys

Tomonori Kitashima; Jincheng Wang; Hiroshi Harada

doi:10.1016/j.intermet.2007.10.001

Phase-field simulation with the CALPHAD method for the microstructure evolution of multi-component Ni-base superalloys

Tomonori Kitashima, Jincheng Wang, Hiroshi Harada

School of Materials Sience and Engineering

National Institute for Materials Science Tsukuba

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

23 Scopus citations

Abstract

In order to simulate multi-component diffusion in a Ni-base superalloy using the phase-field method, the Gibbs free energy of the γ and γ ′ phases in the quaternary Ni-Al-Re-Ta superalloy system was linked to the CALPHAD method using a four-sublattice model. The free energy curve and phase equilibrium compositions in this work were in good agreement with the results of the Thermo-calc calculation, indicating that the model was successfully linked to the CALPHAD method. A one-dimensional phase-field simulation showed a pileup of Re at the γ / γ ′ interface during the growth of precipitates as well as a spike of the Re concentration in a γ ′ phase, accompanied by precipitate coalescence.

Original language	English
Pages (from-to)	239-245
Number of pages	7
Journal	Intermetallics
Volume	16
Issue number	2
DOIs	https://doi.org/10.1016/j.intermet.2007.10.001
State	Published - Feb 2008

Keywords

B. Phase transformation
E. Phase stability, prediction

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10.1016/j.intermet.2007.10.001

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title = "Phase-field simulation with the CALPHAD method for the microstructure evolution of multi-component Ni-base superalloys",

abstract = "In order to simulate multi-component diffusion in a Ni-base superalloy using the phase-field method, the Gibbs free energy of the γ and γ ′ phases in the quaternary Ni-Al-Re-Ta superalloy system was linked to the CALPHAD method using a four-sublattice model. The free energy curve and phase equilibrium compositions in this work were in good agreement with the results of the Thermo-calc calculation, indicating that the model was successfully linked to the CALPHAD method. A one-dimensional phase-field simulation showed a pileup of Re at the γ / γ ′ interface during the growth of precipitates as well as a spike of the Re concentration in a γ ′ phase, accompanied by precipitate coalescence.",

keywords = "B. Phase transformation, E. Phase stability, prediction",

author = "Tomonori Kitashima and Jincheng Wang and Hiroshi Harada",

year = "2008",

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T1 - Phase-field simulation with the CALPHAD method for the microstructure evolution of multi-component Ni-base superalloys

AU - Kitashima, Tomonori

AU - Wang, Jincheng

AU - Harada, Hiroshi

PY - 2008/2

Y1 - 2008/2

N2 - In order to simulate multi-component diffusion in a Ni-base superalloy using the phase-field method, the Gibbs free energy of the γ and γ ′ phases in the quaternary Ni-Al-Re-Ta superalloy system was linked to the CALPHAD method using a four-sublattice model. The free energy curve and phase equilibrium compositions in this work were in good agreement with the results of the Thermo-calc calculation, indicating that the model was successfully linked to the CALPHAD method. A one-dimensional phase-field simulation showed a pileup of Re at the γ / γ ′ interface during the growth of precipitates as well as a spike of the Re concentration in a γ ′ phase, accompanied by precipitate coalescence.

AB - In order to simulate multi-component diffusion in a Ni-base superalloy using the phase-field method, the Gibbs free energy of the γ and γ ′ phases in the quaternary Ni-Al-Re-Ta superalloy system was linked to the CALPHAD method using a four-sublattice model. The free energy curve and phase equilibrium compositions in this work were in good agreement with the results of the Thermo-calc calculation, indicating that the model was successfully linked to the CALPHAD method. A one-dimensional phase-field simulation showed a pileup of Re at the γ / γ ′ interface during the growth of precipitates as well as a spike of the Re concentration in a γ ′ phase, accompanied by precipitate coalescence.

KW - B. Phase transformation

KW - E. Phase stability, prediction

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U2 - 10.1016/j.intermet.2007.10.001

DO - 10.1016/j.intermet.2007.10.001

M3 - 文章

AN - SCOPUS:38149094904

SN - 0966-9795

VL - 16

SP - 239

EP - 245

JO - Intermetallics

JF - Intermetallics

IS - 2

ER -

Phase-field simulation with the CALPHAD method for the microstructure evolution of multi-component Ni-base superalloys

Abstract

Keywords

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