Investigation of Fractured Steel Plates Removed from Welded Ships
Abstract
This report covers the examination of fractured plates selected from 60 ships in which structural failures occurred. The chemical compositions and ordinary mechanical properties of most of the plates were satisfactory and met the specification requirements under which they were purchased. However, Charpy notched bar tests indicated that the plates in which fractures originated were notch sensitive at the temperature of fracture, and plates in which the fractures ended were generally less notch sensitive. Most of the fractures occurred at low operating temperatures, and the origin of each of the fractures examined could be traced to a notch such as a hatch corner, ladder opening, or a faulty weld. Such notches and defects create regions of stress concentration which may start failures in steels that are notch sensitive at the operating temperatures.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 25, 1949
- Accession Number
- AD0636304
Entities
People
- George A. Ellinger
- Morgan L. Williams
Organizations
- National Institute of Standards and Technology