Tensile, impact COD, and wide-plate tests, mainly carried out at -164C, on 9% nickel steel weldments were utilized to predict maximum tolerable defect sizes in cryogenic storage tanks. Results show that at a design stress of 290 N/, the tolerable defect size is satisfactorily large. Local distortion at welds is taken into account. Scanning electron microfractographs show that the rate of propagation on cracks during the fatigue cycling at --164C, to which the wide-plate tests were subjected, agrees excellently with fracture mechanics predictions. They also indicate that, during the final static pull to failure, there was no extension of the cracks by stable tearing prior to the propagation of an unstable crack.

  • Corporate Authors:

    Welding Institute

    Abingdon Hall
    Cambridge CB1 6AL,   England 
  • Authors:
    • Carter, W P
    • Harrison, J C
  • Publication Date: 1974-5

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00057774
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Files: TRIS
  • Created Date: Oct 22 1974 12:00AM