Atom probe microanalysis of Ir-bearing Ni-based superalloys

H. Murakami; Y. Koizumi; T. Yokokawa; Y. Yamabe-Mitarai; T. Yamagata; H. Harada

doi:10.1016/S0921-5093(98)00545-0

Atom probe microanalysis of Ir-bearing Ni-based superalloys

H. Murakami^*, Y. Koizumi, T. Yokokawa, Y. Yamabe-Mitarai, T. Yamagata, H. Harada

^*Corresponding author for this work

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

38 Citations (Scopus)

Abstract

The effects of Ir addition on the microstructural characteristics of Ni-based single crystal superalloys have been investigated using atom probe field ion microscopy (APFIM) and the results were compared with numerical estimations obtained from the Monte Carlo simulations (MCS) and the cluster variation method (CVM). The alloy investigated was TMS-79 (Ni-12.6 at% Al-7.7 at% Cr-4.6 at% Mo-2.7 at% Ta-1.8 at% Ir). APFIM analysis revealed that Ir atoms have a slight preference to partition into the γ-phase and to substitute for the Al site in the γ′ precipitates, which showed agreement with numerical estimations by CVM and MCS. The possible effect of Ir additions on the mechanical properties is briefly discussed.

Original language	English
Pages (from-to)	109-114
Number of pages	6
Journal	Materials Science and Engineering A
Volume	250
Issue number	1
DOIs	https://doi.org/10.1016/S0921-5093(98)00545-0
Publication status	Published - 1998 Jul 15
Externally published	Yes

Keywords

Cluster variation method
Microanalysis
Ni-based superalloys

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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10.1016/S0921-5093(98)00545-0

Cite this

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title = "Atom probe microanalysis of Ir-bearing Ni-based superalloys",

abstract = "The effects of Ir addition on the microstructural characteristics of Ni-based single crystal superalloys have been investigated using atom probe field ion microscopy (APFIM) and the results were compared with numerical estimations obtained from the Monte Carlo simulations (MCS) and the cluster variation method (CVM). The alloy investigated was TMS-79 (Ni-12.6 at% Al-7.7 at% Cr-4.6 at% Mo-2.7 at% Ta-1.8 at% Ir). APFIM analysis revealed that Ir atoms have a slight preference to partition into the γ-phase and to substitute for the Al site in the γ′ precipitates, which showed agreement with numerical estimations by CVM and MCS. The possible effect of Ir additions on the mechanical properties is briefly discussed.",

keywords = "Cluster variation method, Microanalysis, Ni-based superalloys",

author = "H. Murakami and Y. Koizumi and T. Yokokawa and Y. Yamabe-Mitarai and T. Yamagata and H. Harada",

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doi = "10.1016/S0921-5093(98)00545-0",

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T1 - Atom probe microanalysis of Ir-bearing Ni-based superalloys

AU - Murakami, H.

AU - Koizumi, Y.

AU - Yokokawa, T.

AU - Yamabe-Mitarai, Y.

AU - Yamagata, T.

AU - Harada, H.

PY - 1998/7/15

Y1 - 1998/7/15

N2 - The effects of Ir addition on the microstructural characteristics of Ni-based single crystal superalloys have been investigated using atom probe field ion microscopy (APFIM) and the results were compared with numerical estimations obtained from the Monte Carlo simulations (MCS) and the cluster variation method (CVM). The alloy investigated was TMS-79 (Ni-12.6 at% Al-7.7 at% Cr-4.6 at% Mo-2.7 at% Ta-1.8 at% Ir). APFIM analysis revealed that Ir atoms have a slight preference to partition into the γ-phase and to substitute for the Al site in the γ′ precipitates, which showed agreement with numerical estimations by CVM and MCS. The possible effect of Ir additions on the mechanical properties is briefly discussed.

AB - The effects of Ir addition on the microstructural characteristics of Ni-based single crystal superalloys have been investigated using atom probe field ion microscopy (APFIM) and the results were compared with numerical estimations obtained from the Monte Carlo simulations (MCS) and the cluster variation method (CVM). The alloy investigated was TMS-79 (Ni-12.6 at% Al-7.7 at% Cr-4.6 at% Mo-2.7 at% Ta-1.8 at% Ir). APFIM analysis revealed that Ir atoms have a slight preference to partition into the γ-phase and to substitute for the Al site in the γ′ precipitates, which showed agreement with numerical estimations by CVM and MCS. The possible effect of Ir additions on the mechanical properties is briefly discussed.

KW - Cluster variation method

KW - Microanalysis

KW - Ni-based superalloys

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Atom probe microanalysis of Ir-bearing Ni-based superalloys

Abstract

Keywords

ASJC Scopus subject areas

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