Accession Number : AD0670484

Title :   DSSP PROGRAM ON HIGH-STRENGTH MATERIALS (EVALUATION OF AN EXPERIMENTAL TITANIUM-FREE MARAGING STEEL).

Descriptive Note : Memorandum rept.,

Corporate Author : NAVAL RESEARCH LAB WASHINGTON D C

Personal Author(s) : Stonesifer,Fred R. ; Smith,Herschel L. ; Romine,Hugh E.

Report Date : APR 1968

Pagination or Media Count : 31

Abstract : The report begins with a short explanation of why a large titanium content was thought to be a detrimental to toughness of maraging steels. Several metallurgists have identified the fracture nucleating particles in maraging steels as titanium nitrides and titanium carbides. An experimental 'titanium-free' maraging alloy was developed. Two heats were tested; one was of laboratory quality, and one of a quality as might be expected from production heats. Both base plate and welded samples are considered from each heat. Welding with the new titanium-free alloy proved to be a problem which has not yet been solved. At best the new alloy offered only a slight improvement over the normal alloy. The required high purity and difficulity with welding make use of this new alloy impractical at the present time. (Author)

Descriptors :   (*MARAGING STEELS, TOUGHNESS), (*WELDABILITY, MARAGING STEELS), IMPURITIES, TITANIUM COMPOUNDS, CHEMICAL ANALYSIS, WELDING, MICROSTRUCTURE, GRAIN BOUNDARIES, CRACKS, TENSILE PROPERTIES, DEEP SUBMERGENCE, SUBMARINE HULLS, UNDERWATER VEHICLES

Subject Categories : Properties of Metals and Alloys
      Submarine Engineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE