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Very High Cycle Fatigue of D16T Aluminum Alloy

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Abstract

The paper provides a fractographic analysis of fatigue cracking in D16T aluminum alloy under very high cycle fatigue at a frequency of 20 kHz. The analysis shows that in the range of 2.8 × 108 to 5.1 × 109 cycles to failure, the material reveals cracks on and beneath its surface with their subsurface site developing through intergranular fracture at triple junctions or smoothly faceted transgranular fracture. The main crack develops by shear with the formation of differently oriented facets against which a cascade of oriented and misoriented dimples appears. Such dimples are left by spherical and ellipsoidal particles which are formed, displaced, and intruded into both fracture sides as the crack edges come in contact.

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Funding

The work was supported by the Russian Science Foundation (project No. 19-19-00705).

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Authors and Affiliations

  1. Aviation Register of the Russian Federation, 141426, Sheremetyevo Airport, Moscow region, Russia

    A. A. Shanyavskiy

  2. Institute of Computer Aided Design, Russian Academy of Sciences, 123056, Moscow, Russia

    A. A. Shanyavskiy & A. D. Nikitin

  3. Arts et Metiers Institute of Technology, CNRS, University of Bordeaux, 33405, Bordeaux, France

    T. Palin-Luc

Authors
  1. A. A. Shanyavskiy
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  2. A. D. Nikitin
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  3. T. Palin-Luc
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Corresponding author

Correspondence to A. A. Shanyavskiy.

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Russian Text © The Author(s), 2020, published in Fizicheskaya Mezomekhanika, 2020, Vol. 23, No. 3, pp. 43–53.

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Shanyavskiy, A.A., Nikitin, A.D. & Palin-Luc, T. Very High Cycle Fatigue of D16T Aluminum Alloy. Phys Mesomech 24, 77–84 (2021). https://doi.org/10.1134/S1029959921010112

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  • DOI: https://doi.org/10.1134/S1029959921010112

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