THE EFFECTS OF SPECIMEN THICKNESS AND STRESS RELIEF ON FATIGUE CRACK GROWTH RATE IN NICKEL-CHROMIUM-MOLYBDENUM-VANADIUM STEEL

Structural design now incorporates the weight-saving advantage of high-strength alloys by reducing the thickness requirements of load-bearing members. For fail-safe applications of thin-section material (less than 0.50 in. (12.7 mm) thick) in high-performance ship structures, quantitative information concerning fatigue crack growth rate (FCGR) is highly important. The paucity and diverse conclusions of presently available information concerning the effect of material thickness on FCGR provides little engineering guidance for the design of thin-section structures. This study of FCGR on a 5Ni-Cr-Mo-V steel tested in three thicknesses indicates that internal residual stresses may have a retardation effect on FCGR in this material. When the material was tested after stress relief, crack growth was accelerated and was essentially the same for all thicknesses.

  • Corporate Authors:

    American Society for Testing and Materials

    100 Barr Harbor Drive, P.O. Box C700
    West Conshohocken, PA  United States  19428-2957
  • Authors:
    • Sullivan, A M
    • Crooker, T W
  • Publication Date: 1977-3

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Filing Info

  • Accession Number: 00163619
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Oct 29 1977 12:00AM