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Fatigue crack growth in KhN60MVYu nickel alloy at temperatures of 293 and 11°K

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Strength of Materials Aims and scope

Conclusions

  1. 1.

    The results show that when the temperature is reduced from 293 to 11°K the fatigue crack growth rate in Kh60MVYu nickel alloy decreases only insignificantly and only in the near-threshold region. Under the effect of vacuum the rate decreases to a considerably greater extent and in a wider range.

  2. 2.

    The threshold stress intensity factor Kth increases under the effect of both the medium and low temperature (11°K).

  3. 3.

    The size of the plastic zone at the crack tip is independent of the medium and decreases with decreasing temperature.

  4. 4.

    The size of the plastic zone at the point with the abscissa K* corresponds to 2h=3d, both for 293°K and 11°K. At this point the value m changes abruptly from m2=2 to m1=6.

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Authors
  1. E. N. Aleksenko
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  2. N. M. Grinberg
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  3. K. A. Yushchenko
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Additional information

Physicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, Kharkov. E. O. Paton Electric Welding Institute, Academy of Sciences of the Ukrainian SSR, Kiev. Translated from Problemy Prochnosti, No. 5, pp. 25–31, May, 1988.

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Aleksenko, E.N., Grinberg, N.M. & Yushchenko, K.A. Fatigue crack growth in KhN60MVYu nickel alloy at temperatures of 293 and 11°K. Strength Mater 20, 590–596 (1988). https://doi.org/10.1007/BF01528545

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