Atom probe microanalysis of Ir-bearing Ni-based superalloys

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

Research output: Contribution to journalArticle

36 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 languageEnglish
Pages (from-to)109-114
Number of pages6
JournalMaterials Science and Engineering A
Volume250
Issue number1
DOIs
Publication statusPublished - 1998 Jul 15
Externally publishedYes

Fingerprint

Bearings (structural)
Microanalysis
heat resistant alloys
microanalysis
Superalloys
cluster variation method
Atoms
probes
Microscopic examination
Ions
microscopy
atoms
Precipitates
precipitates
partitions
ions
simulation
Single crystals
mechanical properties
substitutes

Keywords

  • Cluster variation method
  • Microanalysis
  • Ni-based superalloys

ASJC Scopus subject areas

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

Cite this

Murakami, H., Koizumi, Y., Yokokawa, T., Yamabe-Mitarai, Y., Yamagata, T., & Harada, H. (1998). Atom probe microanalysis of Ir-bearing Ni-based superalloys. Materials Science and Engineering A, 250(1), 109-114. https://doi.org/10.1016/S0921-5093(98)00545-0

Atom probe microanalysis of Ir-bearing Ni-based superalloys. / Murakami, Hideyuki; Koizumi, Y.; Yokokawa, T.; Yamabe-Mitarai, Y.; Yamagata, T.; Harada, H.

In: Materials Science and Engineering A, Vol. 250, No. 1, 15.07.1998, p. 109-114.

Research output: Contribution to journalArticle

Murakami, H, Koizumi, Y, Yokokawa, T, Yamabe-Mitarai, Y, Yamagata, T & Harada, H 1998, 'Atom probe microanalysis of Ir-bearing Ni-based superalloys', Materials Science and Engineering A, vol. 250, no. 1, pp. 109-114. https://doi.org/10.1016/S0921-5093(98)00545-0
Murakami, Hideyuki ; Koizumi, Y. ; Yokokawa, T. ; Yamabe-Mitarai, Y. ; Yamagata, T. ; Harada, H. / Atom probe microanalysis of Ir-bearing Ni-based superalloys. In: Materials Science and Engineering A. 1998 ; Vol. 250, No. 1. pp. 109-114.
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