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The Effect of Microstructure on the Fatigue Behavior of NI Base Superalloys

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Fatigue

Part of the book series: Sagamore Army Materials Research Conference Proceedings ((SAMC,volume 27))

Abstract

The fatigue crack propagation (FCP) and low cycle fatigue (LCF) behavior of Ni base systems is reviewed. It is seen that for typical Ni base alloys such as Waspaloy, René 95, In 718 and Astroloy the FCP rate decreases with increasing slip planarity, in agreement with previous theoretical suggestions.

The high temperature LCF behavior of alloys such as René 77, René 80 and others is determined by a trade-off between structural coarsening, which is beneficial, and environmental degradation. In René 80 at 871°C and 982°C the trade-off is such that the life increases with decreasing frequency or with imposition of a hold time. Low cycle fatigue data for alloys such as René 77, René 80, Mar M002 and Nimonic 90 are in agreement with an idea which assumes that crack initiation occurs at a unique combination of maximum stress and environmental damage. This idea is used to deduce an expression for the LCF behavior of stable materials in terms of frequency, hold time, temperature, plastic strain range and cyclic stress/strain parameters. The resulting model predicts general trends in high temperature LCF behavior as well as Coffin-Manson LCF exponents.

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Author information

Authors and Affiliations

  1. Department of Materials Science and Metallurgical Engineering, University of Cincinnati, Cincinnati, OH, 45221, USA

    Stephen D. Antolovich (Professor of Materials Science) & N. Jayaraman (Visiting Assistant Professor of Materials Science)

Authors
  1. Stephen D. Antolovich
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  2. N. Jayaraman
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Editor information

Editors and Affiliations

  1. Syracuse University, Syracuse, New York, USA

    Volker Weiss

  2. Army Materials and Mechanics Research Center, Watertown, Massachusetts, USA

    John J. Burke

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© 1983 Springer Science+Business Media New York

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Antolovich, S.D., Jayaraman, N. (1983). The Effect of Microstructure on the Fatigue Behavior of NI Base Superalloys. In: Burke, J.J., Weiss, V. (eds) Fatigue. Sagamore Army Materials Research Conference Proceedings, vol 27. Springer, Boston, MA. https://doi.org/10.1007/978-1-4899-1736-2_7

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  • DOI: https://doi.org/10.1007/978-1-4899-1736-2_7

  • Publisher Name: Springer, Boston, MA

  • Print ISBN: 978-1-4899-1738-6

  • Online ISBN: 978-1-4899-1736-2

  • eBook Packages: Springer Book Archive

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