DSSP PROGRAM ON HIGH-STRENGTH MATERIALS EVALUATION OF 350 KSI, 18% NICKEL MARAGING STEEL.
Abstract
The report describes the study of one material for possible use in the pressure hull of a deep submergence vehicle operating at depths up to 20,000 feet. A pressure hull operating at these depths with a satisfactory weight/displacement ratio requires one to look at materials which might otherwise be classified as too brittle to consider for structural purposes. The material was a 350 ksi, 18% nickel-cobalt-molybdenum maraging steel. Since fracture strength in general decreases with increasing yield strength one would expect somewhat low critical stress-intensity parameter or K sub Ic values at this strength level. However, laboratory heats were giving higher than usual elongations of the order of 10%. It was felt worthwhile to investigate the fracture toughness characteristics of both base plate and welds. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1967
- Accession Number
- AD0664944
Entities
People
- F. R. Stonesifer
- Hillary L. Smith
Organizations
- United States Naval Research Laboratory