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Cause of attenuation of signals of acoustic emission in plastic deformation of metals beyond the yield point

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Strength of Materials Aims and scope

Conclusions

  1. 1.

    The mean jump of elongation δ0 in uniaxial plastic strain of a polycrystalline specimen is proportional to D2, where D is the mean dimension of the fragments (regions of ideal crystal lattice), therefore in consequence of fragmentation it decreases with increasing plastic strain e in accordance with the relation δ0∿e-1.

  2. 2.

    The intensity of the signal of acoustic emission Wξ∿δ0∿e-1, and its rms value Uξ∿e-1/2, which is in agreement with the experimental data. This testifies to the fact that fragmentation is the main cause of the drop of the characteristics of AE of polycrystals beyond the yield point.

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Authors
  1. A. A. Yudin
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  2. V. I. Ivanov
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Additional information

Central Research Institute of Engineering Technology, Moscow. Translated from Problemy Prochnosti, No. 10, pp. 74–77, October, 1988.

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Yudin, A.A., Ivanov, V.I. Cause of attenuation of signals of acoustic emission in plastic deformation of metals beyond the yield point. Strength Mater 20, 1362–1366 (1988). https://doi.org/10.1007/BF01531553

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  • DOI: https://doi.org/10.1007/BF01531553

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