Accession Number:

AD0763480

Title:

Low Temperature Solubility of Hydrogen in Niobium.

Descriptive Note:

Technical rept.,

Corporate Author:

ILLINOIS UNIV URBANA DEPT OF METALLURGY AND MINING ENGINEERING

Report Date:

1973-07-01

Pagination or Media Count:

31.0

Abstract:

The precipitation of hydrogen from solid solution to form a hydride was studied in the Nb-H and Nb-D systems at temperatures between 77K and 300K. A large amount of undercooling was observed during cooling the extent of which decreased after thermally cycling. On heating a large thermal hysteresis was observed before resolution of the hydrides occurred. These results were interpreted in terms of a precipitation model which requires a large amount of plastic accommodation to occur during precipitation. The effects of N additions and cold working were studied and shown to be consistent with this model. Author

Subject Categories:

  • Metallurgy and Metallography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE