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Hardness and phase analysis of IN 718 deformed at high strain rate

Analytical and Bioanalytical Chemistry volume 379, pages 619–621 (2004)Cite this article

Abstract

Specimens of the nickel base alloy IN 718 deformed at high strain rate (~10 s−1), as realized in a screw press, have higher strength than parts forged conventionally in a hydraulic press. Microstructure analyses in light and transmission electron microscopes reveal the precipitation of very small Ni3Nb particles (γ″-phase) to be the reason for the increased hardness. Several processing routes are discussed and analyzed in relation to the TTT-diagram of IN 718.

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References

  1. Horvath W et al. (2001) Proc Int Symp on Superalloys 718, 625 and Various Derivatives, Structural Materials Division (SMD), The Minerals, Metals, and Materials Society, pp 223–228

  2. Oradei-Basile A, Radavich JF (1991) Proc Int Symp on Superalloys 718, 625, 706 and Various Derivatives, Structural Materials Division, The Minerals, Metals, and Materials Society, pp 325–335

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Affiliations

  1. Lehrstuhl für Werkstoffkunde und Werkstoffmechanik and Christian-Doppler-Laboratorium für moderne Mehrphasenstähle, Technische Universität München, Boltzmannstraße 15, 85747, Garching b. München, Germany

    L. Renhof, S. Guder & E. Werner

Authors
  1. L. Renhof
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  2. S. Guder
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  3. E. Werner
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Correspondence to L. Renhof.

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Renhof, L., Guder, S. & Werner, E. Hardness and phase analysis of IN 718 deformed at high strain rate. Anal Bioanal Chem 379, 619–621 (2004). https://doi.org/10.1007/s00216-004-2524-2

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  • DOI: https://doi.org/10.1007/s00216-004-2524-2

Keywords

  • IN 718
  • Ni3Nb-precipitation
  • γ″-phase
  • Electron microscopy