Accession Number : AD0766288

Title :   Evaluation of Metal Composites for Use in Weapon Components.

Descriptive Note : Technical rept.,

Corporate Author : MARTIN MARIETTA CORP BALTIMORE MD RESEARCH INST FOR ADVANCED STUDIES

Personal Author(s) : Precht,Walter ; Preece,Carolyn M.

Report Date : JUL 1973

Pagination or Media Count : 28

Abstract : The concept of increasing the strength of cobalt-base alloys by dispersion hardening with a stable MC carbide was investigated. A powder metallurgy process was used to allow the cobalt alloy matrix and the specific carbide to be selected independently and combined in optimum proportions. A number of fabrication procedures have been evaluated, the most successful to date being one in which the composite is prepared by hot pressing a mixture of the elemental metal powders with fine carbide powder. On the basis of tensile strength, room temperature ductility, and oxidation resistance considerations, a composite of Co-21 w/o Cr-26 w/o Ni with 10 w/o TiC-50% VC was selected for study. The high temperature tensile properties of this composite compare very favorably with those of the current commercially available cobalt base superalloys. (Modified author abstract)

Descriptors :   (*CERMETS, COBALT ALLOYS), (*COBALT ALLOYS, *DISPERSION HARDENING), POWDER METALLURGY, CARBIDES, CHROMIUM ALLOYS, NICKEL ALLOYS, TITANIUM COMPOUNDS, VANADIUM COMPOUNDS, HOT PRESSING

Subject Categories : Laminates and Composite Materials
      Metallurgy and Metallography

Distribution Statement : APPROVED FOR PUBLIC RELEASE