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Microstructural Characterization of the White Etching Layer in Nickel-Based Superalloy

  • A. M. Wusatowska-SarnekEmail author
  • B. Dubiel
  • A. Czyrska-Filemonowicz
  • P. R. Bhowal
  • N. Ben Salah
  • J. E. Klemberg-Sapieha
Article

Abstract

Microstructural characterization of the white etching layer (WEL) formed during milling in a fine-grained IN100 Ni-based superalloy was conducted. The microstructure of the layer depended on milling parameters, and under typical machining conditions, where moderate surface speed was used, the white layer exhibited nanostructure character. Fast surface speed produced partial amorphization of the outermost layer. Limited notched low cycle fatigue (LCF) testing was performed, and it was demonstrated that the fatigue properties deteriorated significantly in the specimens where WEL was present in the notch-root surface.

Keywords

Milling Select Area Electron Diffraction Pattern White Layer Notch Root Uncut Chip Thickness 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgments

The authors acknowledge support from Pratt & Whitney in conducting this work, Mr. Michael W. Fox (Pratt & Whitney) for various phases of metallographic evaluation, Mrs. Krystyna Plonska-Niznik (AGH-UST) as well as Dr. Heinz-Josef Penkalla and Mrs. Daniela Esser (Forschungszentrum Jülich) for thin foil preparation, Dr. Aleksandre Vasiliev (Institute of Crystallography, Russian Academy of Sciences) for EELS analysis, and Mr. Édouard Proust (École Polytechnique de Montréal) for the nanoindentation measurements. The stimulating discussions with Professor Roman Wusatowski are greatly acknowledged.

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Copyright information

© The Minerals, Metals & Materials Society and ASM International 2011

Authors and Affiliations

  • A. M. Wusatowska-Sarnek
    • 1
    Email author
  • B. Dubiel
    • 2
  • A. Czyrska-Filemonowicz
    • 2
  • P. R. Bhowal
    • 1
  • N. Ben Salah
    • 3
    • 4
  • J. E. Klemberg-Sapieha
    • 5
  1. 1.Pratt & Whitney, Materials & Processes EngineeringEast HartfordUSA
  2. 2.Faculty of Metals Engineering and Industrial Computer ScienceAGH University of Science and TechnologyKrakowPoland
  3. 3.Materials Engineering, Pratt & Whitney CanadaLongueuilCanada
  4. 4.HerouxDevtek, Engineering R&DLongueuilCanada
  5. 5.Functional Coatings and Surface Engineering Laboratory, Department of Engineering PhysicsÉcole Polytechnique de MontréalMontréalCanada

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