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The effect of aging and cold working on the high-temperature low-cycle fatigue behavior of alloy 800H: Part I. The effect of hardening processes on the initial stress-strain curve

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Abstract

The individual and combined effects of cold working (5 and 10 pct) and aging (4000 and 8000 h at 538 to 760°) on the microstructure and high-temperature yield strength of al-loy 800H have been investigated. The specimens were tested at the aging temperatures. During testing some of the specimens showed the phenomenon of serrated yielding. In order of importance, the principal hardening agents observed in this work were: cold work, the precipitation of Cr233C6 at the grain boundaries, and, in some cases, the precipitation of a Perovskite-type γ’ phase in the grain interiors.

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Authors and Affiliations

  1. General .Atomic Company, 92138, San Diego, CA

    R. E. Villagrana (Staff Scientist), J. L. Kaae (Senior Technical Advisor) & P. K. Gantzel (Staff Scientist)

  2. Oak Ridge National Laboratory, 37831, Oak Ridge, TN

    J. R. Ellis (Member of the Technical Staff)

Authors
  1. R. E. Villagrana
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  2. J. L. Kaae
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  3. J. R. Ellis
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  4. P. K. Gantzel
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Villagrana, R.E., Kaae, J.L., Ellis, J.R. et al. The effect of aging and cold working on the high-temperature low-cycle fatigue behavior of alloy 800H: Part I. The effect of hardening processes on the initial stress-strain curve. Metall Trans A 9, 927–934 (1978). https://doi.org/10.1007/BF02649836

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  • DOI: https://doi.org/10.1007/BF02649836

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