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Additional evidence for the plastic blunting process of fatigue crack propagation

  • Mechanical Behavior
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Abstract

Current workers who deal with fatigue crack propagation mechanisms express the view that fracture surface striations are formed at the start of a tensile stroke instead of the end of a compressive stroke, as required by the older mechanism of the “plastic blunting process” (PBP). The current views are criticized and new fractographic evidence is presented in support of the PBP mechanism. The effects of a nonzero mean stress and of environment are also discussed. Variable amplitude tests are shown to be useful in dealing with questions about crack propagation kinetics.

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Authors and Affiliations

  1. Department of Metallurgy and Materials Science, University of Pennsylvania, 19174, Philadelphia, PA

    Campbell Laird (Member AIME and ASM, Chairman)

  2. Mechanical Testing Laboratory Laboratory for Research on the Structure of Matter, University of Pennsylvania, 19174, Philadelphia, PA

    Raymond de la Veaux (Supervisor)

Authors
  1. Campbell Laird
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  2. Raymond de la Veaux
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Laird, C., de la Veaux, R. Additional evidence for the plastic blunting process of fatigue crack propagation. Metall Trans A 8, 657–664 (1977). https://doi.org/10.1007/BF02676989

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  • DOI: https://doi.org/10.1007/BF02676989

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