Accession Number:

ADA003007

Title:

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

Descriptive Note:

Final technical rept. 1 Dec 73-19 Oct 74,

Corporate Author:

GENERAL ELECTRIC CORPORATE RESEARCH AND DEVELOPMENT SCHENECTADY N Y

Personal Author(s):

Report Date:

1974-10-01

Pagination or Media Count:

29.0

Abstract:

The goal of this program is to develop a scientific basis for the production of aligned two-phase composites by the directional control of solid-state phase transformations, particularly eutectoid decomposition. Section I reviews the current state of our understanding of the production of aligned eutectoids and aligned eutectics. Because of the importance of crystallography to the morphology, stability, and properties of aligned eutectoids, crystallographic relations were studied in the Cu-Al eutectoid by transmission electron microscopy and diffraction in Section II. One objective of this program was to identify promising systems for possible structural use at elevated temperatures. Of the various eutectoid alloys aligned to date, Co-Si was identified as the one with the greatest potential in this regard. Section III describes the tensile behavior of Co-Si from room temperature to 1100C. Section IV describes results of preliminary experiments on the effects of transition metal ternary alloying elements on the microstructure of Co-Si eutectoid. Section V describes some experiments that are suggested for completion during a proposed third year of this contract study.

Subject Categories:

  • Laminates and Composite Materials
  • Properties of Metals and Alloys

Distribution Statement:

APPROVED FOR PUBLIC RELEASE