Accession Number:

AD0463840

Title:

RESEARCH INVESTIGATION OF PHASE-REINFORCED HIGH-TEMPERATURE ALLOYS PRODUCED DIRECTLY FROM A MELT

Descriptive Note:

Quarterly progress rept. no. 3, 31 Dec 1964-31 Mar 1965,

Corporate Author:

UNITED TECHNOLOGIES CORP HARTFORD CT

Personal Author(s):

Report Date:

1965-04-15

Pagination or Media Count:

42.0

Abstract:

The results of continued investigations on whicker-reinforced high temperature eutectic alloys are presented. Ingots of Ta-Ta2C have been unidirectionally solidified at 15 cmhr to produce a composite of aligned tantalum carbide rods and platelets within a matrix of tantalum using a modified electron beam zone melting apparatus. A consistent crystallographic relationship between Ni and NiBe interpenetrating single crystal lamellae of a eutectic grain has been examined in detail using a hard sphere atomistic model of the interface. The results of a study of cyclically loaded Ni-NiBe eutectic alloy has indicated that most of the deformation takes place within the nickel solid solution matrix. The yield strength increased with each cycle and reached a constant maximum value after four cycles.

Subject Categories:

  • Metallurgy and Metallography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE