Steam oxidation behavior of Ni-base superalloys 690, 725 and X-750 at 600 and 650 °C

L. Tan; T. Chen; B. A. Pint

doi:10.1016/j.corsci.2019.06.014

Steam oxidation behavior of Ni-base superalloys 690, 725 and X-750 at 600 and 650 °C

L. Tan, T. Chen, B. A. Pint

Corrosion Science & Technology

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

6 Scopus citations

Abstract

The 1-bar steam oxidation behavior of Ni-base superalloys 690, 725, and X-750 was evaluated at 600 and 650 °C for up to 5000 h. In addition to monitoring mass changes, microstructures of the 5000-h-exposed samples were characterized using scanning and transmission electron microscopy and energy dispersive x-ray spectroscopy. Together with thermodynamic calculations, the scale constitution and possible exfoliation was discussed. Alloy X-750 exhibited the best resistance to steam oxidation with the least metal thickness loss at 600 °C while alloy 690 at 650 °C. Alloy 725 exhibited more than two times metal thickness loss than the other two alloys at 650 °C.

Original language	English
Pages (from-to)	487-497
Number of pages	11
Journal	Corrosion Science
Volume	157
DOIs	https://doi.org/10.1016/j.corsci.2019.06.014
State	Published - Aug 15 2019

Funding

This manuscript has been authored by UT-Battelle, LLC under Contract No. DE-AC05-00OR22725 with the U.S. Department of Energy. The United States Government retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a non-exclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript, or allow others to do so, for United States Government purposes. The Department of Energy will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan ( http://energy.gov/downloads/doe-public-access-plan ). The material is based upon work supported by the U.S. Department of Energy, Office of Nuclear Energy, Light Water Reactor Sustainability Program , under Contract no. DE-AC05-00OR22725. The Advanced Radiation Resistant Materials Program, led by Electric Power Research Institute, is appreciated for sharing the alloys.

Funders	Funder number
Office of Nuclear Energy, Light Water Reactor Sustainability Program	DE-AC05-00OR22725
U.S. Department of Energy

Keywords

A. Superalloys
B. SEM
B. TEM
C. Oxidation

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10.1016/j.corsci.2019.06.014

Cite this

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title = "Steam oxidation behavior of Ni-base superalloys 690, 725 and X-750 at 600 and 650 °C",

abstract = "The 1-bar steam oxidation behavior of Ni-base superalloys 690, 725, and X-750 was evaluated at 600 and 650 °C for up to 5000 h. In addition to monitoring mass changes, microstructures of the 5000-h-exposed samples were characterized using scanning and transmission electron microscopy and energy dispersive x-ray spectroscopy. Together with thermodynamic calculations, the scale constitution and possible exfoliation was discussed. Alloy X-750 exhibited the best resistance to steam oxidation with the least metal thickness loss at 600 °C while alloy 690 at 650 °C. Alloy 725 exhibited more than two times metal thickness loss than the other two alloys at 650 °C.",

keywords = "A. Superalloys, B. SEM, B. TEM, C. Oxidation",

author = "L. Tan and T. Chen and Pint, {B. A.}",

note = "Publisher Copyright: {\textcopyright} 2019 Elsevier Ltd",

year = "2019",

month = aug,

day = "15",

doi = "10.1016/j.corsci.2019.06.014",

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T1 - Steam oxidation behavior of Ni-base superalloys 690, 725 and X-750 at 600 and 650 °C

AU - Tan, L.

AU - Chen, T.

AU - Pint, B. A.

PY - 2019/8/15

Y1 - 2019/8/15

N2 - The 1-bar steam oxidation behavior of Ni-base superalloys 690, 725, and X-750 was evaluated at 600 and 650 °C for up to 5000 h. In addition to monitoring mass changes, microstructures of the 5000-h-exposed samples were characterized using scanning and transmission electron microscopy and energy dispersive x-ray spectroscopy. Together with thermodynamic calculations, the scale constitution and possible exfoliation was discussed. Alloy X-750 exhibited the best resistance to steam oxidation with the least metal thickness loss at 600 °C while alloy 690 at 650 °C. Alloy 725 exhibited more than two times metal thickness loss than the other two alloys at 650 °C.

AB - The 1-bar steam oxidation behavior of Ni-base superalloys 690, 725, and X-750 was evaluated at 600 and 650 °C for up to 5000 h. In addition to monitoring mass changes, microstructures of the 5000-h-exposed samples were characterized using scanning and transmission electron microscopy and energy dispersive x-ray spectroscopy. Together with thermodynamic calculations, the scale constitution and possible exfoliation was discussed. Alloy X-750 exhibited the best resistance to steam oxidation with the least metal thickness loss at 600 °C while alloy 690 at 650 °C. Alloy 725 exhibited more than two times metal thickness loss than the other two alloys at 650 °C.

KW - A. Superalloys

KW - B. SEM

KW - B. TEM

KW - C. Oxidation

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DO - 10.1016/j.corsci.2019.06.014

M3 - Article

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SN - 0010-938X

VL - 157

SP - 487

EP - 497

JO - Corrosion Science

JF - Corrosion Science

ER -

Steam oxidation behavior of Ni-base superalloys 690, 725 and X-750 at 600 and 650 °C

Abstract

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Keywords

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Cite this

Steam oxidation behavior of Ni-base superalloys 690, 725 and X-750 at 600 and 650 °C

Abstract

Funding

Keywords

Access to Document

Other files and links

Fingerprint

Cite this

Steam oxidation behavior of Ni-base superalloys 690, 725 and X-750 at 600 and 650 °C