Evaluation of Metal Composites for Use in Weapon Components.
MARTIN MARIETTA CORP BALTIMORE MD RESEARCH INST FOR ADVANCED STUDIES
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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 wo Cr-26 wo Ni with 10 wo 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
- Laminates and Composite Materials
- Metallurgy and Metallography