Accession Number:

AD0606494

Title:

INVESTIGATION OF THE STRENGTHENING MECHANISMS OF DISPERSION STRENGTHENED ALLOYS.

Descriptive Note:

Rept. for 1 Feb 63-29 Feb 64,

Corporate Author:

MASSACHUSETTS INST OF TECH CAMBRIDGE HIGH TEMPERATURE MATERIALS LAB

Personal Author(s):

Report Date:

1964-07-01

Pagination or Media Count:

47.0

Abstract:

In an effort to produce dispersion-strengthened alloys with more versatile strength properties than those reported for oxide dispersion strengthened systems, the systems Ni-TiC and Ni-TiB2 were studied. Diffusion couples of dilute alloys of Ni-C and Ni-Ti as well as of Ni-B and Ni-Ti were studied to determine the conditions necessary for the formation of a fine dispersion of TiC and TiB2 in nickel. TiB2 was found to be unsuitable for this type of application. Nickel-base alloys with a dispersion of TiC were prepared by several powder metallurgical techniques as well as by internal carburization of Ni-Ti chips. The mechanical properties of these alloys were studied at room temperature and 815C and a comparison made with the properties of conventional alloys reported for these temperatures. Transmission electron microscopy was used to study the elastic strain fields associated with dispersoid particles in the Ni-Al2O3 and Cu-Al2O3 systems, prepared by internal oxidation. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE