Accession Number:

ADA023007

Title:

Metallic Composites Formed 'in situ' by Reactions in the Solid State.

Descriptive Note:

Final rept. 18 Oct 74-18 Oct 75,

Corporate Author:

GENERAL ELECTRIC CORPORATE RESEARCH AND DEVELOPMENT SCHENECTADY N Y

Personal Author(s):

Report Date:

1975-11-01

Pagination or Media Count:

36.0

Abstract:

The major portion of this years effort was study of the effects of alloying elements on the structure and properties of aligned Co-Si eutectoid. Of the nine alloying elements studied, only Ni could be added in appreciable quantities without disturbing the aligned eutectoid microstructure. Additions of Cr, Fe, Mn, or Cu produced cellular eutectoid microstructures. Additions of W, Ta, or Al produced eutectic, rather than eutectoid, microstructures. Most alloying additions caused a decrease in mechanical properties. Some improvement, however, was produced by alloying with W, and a Co-W-Si alloy showed a tensile strength at 900C of 78,800 psi. Other studies included electron microscope studies of quenched Co-Si microstructures, attempts to improve the room temperature ductility of Co-Si, and studies of eutectoid transformations in Ti-Cu, Mo-Fe, and Mo-Co alloys.

Subject Categories:

  • Laminates and Composite Materials
  • Properties of Metals and Alloys

Distribution Statement:

APPROVED FOR PUBLIC RELEASE