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The effect of aging and cold working on the high-temperature low-cycle fatigue behavior of alloy 800h: part ii: continuous cyclic loading

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Abstract

The individual and combined effects of cold working (5 and 10 pct) and aging (4000 and 8000 h in the temperature range 538 to 760 °C) on the high-temperature low-cycle fatigue behavior of alloy 800H have been investigated. The specimens were tested at the aging temperatures. Both the saturation stress range and the fatigue life were found to be history dependent. A history-independent hardening mechanism, dynamic strain aging, was found to operate over the temperature range ~450 to 650°C and to be maximized at ~55O °C. It is speculated that carbon is responsible for this dynamic strain aging. Finally, at temperatures above 538 °C the Coffin-Manson plots show a history-independent deviation from linearity.

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References

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Authors and Affiliations

  1. San Diego, CA

    R. E. Villagrana (Consultant)

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

    J. L. Kaae (Technical Advisor)

  3. 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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Formerly a Staff Scientist at General Atomic Co.

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Villagrana, R.E., Kaae, J.L. & Ellis, J.R. The effect of aging and cold working on the high-temperature low-cycle fatigue behavior of alloy 800h: part ii: continuous cyclic loading. Metall Trans A 12, 1849–1857 (1981). https://doi.org/10.1007/BF02643795

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  • DOI: https://doi.org/10.1007/BF02643795

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