AN INVESTIGATION OF THE FATIGUE AND FRACTURE PROPERTIES OF SELECTED HULL PLATE SAMPLES FROM THE COAST GUARD CUTTER STATEN ISLAND

The fracture toughness, fatigue crack propagation behavior, and tensile properties were evaluated for six selected hull plate samples at the icebreaker operating temperatures of F and -30F. In addition, the nil-ductility transition temperature, chemical composition, average grain size and susceptibility to delayed fracture were investigated. It was found that, in general, the static fracture toughness was reasonably high, and that plane- strain validity could not be achieved at the temperatures of interest with the specimen thicknesses provided. One plate did exhibit a somewhat lower toughness, but the reasons for this were not readily apparent and were beyond the immediate scope of this work. The tensile properties and NDT appear to be reasonable for this grade of steel, and the material exhibited little or no tendency for sub-critical cracking under a sustained load in an aggressive environment.

• Corporate Authors:

  Pacific Northwest National Laboratory

  3180 George Washington Way
  Richland, WA  United States  99354
• Authors:
  • James, Lee A
• Publication Date: 1969-8-14

Media Info

• Pagination: 77 p.

Subject/Index Terms

• TRT Terms: Cracking; Fatigue cracking; Hulls; Icebreakers; Vehicle design
• Uncontrolled Terms: Crack propagation; Ship hulls
• Subject Areas: Design; Marine Transportation; Materials;

Filing Info

• Accession Number: 00015324
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: Summ Rpt
• Contract Numbers: DOT-CG-92664-A
• Files: TRIS
• Created Date: May 13 1973 12:00AM