Machines. Technologies. Materials.
Vol. 15 (2021), Issue 7, pg(s) 271-274

MATERIALS

Estimation of the elasticity module of Al-Si alloy samples in cast and deformed states by the frequency spectrum of sound vibrations

  • 1 Frantsevich Institute for Problems in Materials Science, NAS of Ukrane, Kyiv

Abstract

Using fast Fourier transform the frequency spectra of sound vibrations of sound obtained by impacting a suspended material sample were obtained and analyzed. For this, the corresponding short sound files were recorded, which were then subjected to computer analysis. It was found that the frequency spectra of sound vibrations for cast silumin and for those after deformation-heat treatment have a different character. So in these spectra obtained for samples that have passed the deformation-heat treatment, a set of narrow, clearly peaks at certain frequencies have been observed. In the spectra obtained for cast samples, such clear, narrow peaks are not observed. The position of the characteristic peaks in the frequency spectra of sound vibrations was used to estimate the elastic modulus for samples that have passed various regimes of deformation-heat treatment.

Keywords

References

  1. G. Nussbaumer. Fast Fourier Transform and Convolution Computing Algorithms / G. Nussbaumer – Moscow: Radio and communication, 1985, 248 p. (Rus.)
  2. NumPy: The fundamental package for scientific computing with Python. [Electronic resource] Access mode: https://numpy.org
  3. Math in Python: Fourier Transform. [Electronic resource] Access mode: http://old.pynsk.ru/posts/2015/Nov/09/matematika-v-python-preobrazovanie-fure/#.X6FOS3Qa-Uk (Rus.)
  4. Matplotlib: Visualization with Python. [Electronic resource] Access mode: https://matplotlib.org
  5. jMicroVision: User-friendly software for analyzing large images. [Electronic resource] Access mode: https://jmicrovision.github.io
  6. N. I. Lavrovich. Natural frequencies of rods oscillation. / N. I. Lavrovich // Omsk Scientific Bulletin. – 2000. – Vol. 12 – P. 106–108. (Rus.)
  7. Table. Axial moments of inertia, moments of resistance and radii of inertia of plane figures. [Electronic resource] Access mode: https://tehtab.ru/Guide/GuideMatherials/MaterialsResistant/Momen tsOfInertion/ (Rus.)
  8. O. M. Dubovyi, Formation of nanosized polygonization substructure and its influence on the physical and mechanical properties of metals, feet and powdered coatings / O.M. Dubovyi, A.A. Karpechenko, M.M. Bobrov, O.O. Zhdanov, T.O. Makrukha, Y.E. Nedelko // Metal Physics and the latest technologies, 2017. – vol. 39, № 2. – P. 209-243. (Ukr.)

Article full text

Download PDF