Accession Number:

AD0274151

Title:

LOW-TEMPERATURE BRITTLENESS OF REFRACTORY METALS

Descriptive Note:

Final rept.

Corporate Author:

GENERAL ELECTRIC RESEARCH LAB SCHENECTADY NY METALLURGY AND CERAMICS RESEARCH DEPT

Personal Author(s):

Report Date:

1962-04-01

Pagination or Media Count:

110.0

Abstract:

Effort was directed towards 1 the production of high-purity material, 2 determination of the modes of deformation and the mechanical properties of W single crystals as a function of temperature, and 3 the behavior of individual dislocations. The W was produced in the form of single crystals and purified by the electron bombardment floating zone refining technique developed by Calverly, Davis, and Lever J. Sci. Instr. 34142, 1957. The modes of deformation and mechanical properties were determined at 500 to 20 K with standard techniques and the single crystals. The behavior of individual dislocations was observed with the aid of the etchpitting technique of Wolff Acta Metallurgica 6559, 1958 and the technique of Stein and Low J. Appl. Phys. 31362, 1960 ctfor measuring dislocation velocities. Appended are 1 a study of the recrystallization characteristics of cold-worked single crystals, and 2 a brief report on crystallography of twins in Mo-35 at.- Re single crystal.

Subject Categories:

  • Metallurgy and Metallography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE