Accession Number : AD0635596

Title :   PETCH ANALYSIS OF HYDROGENATED TANTALUM SHEET.

Descriptive Note : Technical rept.

Corporate Author : ARMY MATERIALS RESEARCH AGENCY WATERTOWN MASS MATERIALS ENGINEERING DIV

Personal Author(s) : GAZZA, George E.

Report Date : MAY 1966

Pagination or Media Count : 13

Abstract : The anomalous behavior in ductility exhibited by tantalum, at low temperature, with hydrogen as an impurity was investigated utilizing a Petch-type analysis. The change in lattice friction stress and dislocation locking stress parameters were determined through a temperature range from room temperature to -196C. The results of the investigation show the locking stress remained essentially unchanged by small hydrogen additions while the lattice friction stress increased significantly at temperatures below -78C. (Author)

Descriptors :   (*HYDROGEN EMBRITTLEMENT, TANTALUM), (*TANTALUM, LOW TEMPERATURE), (*HYDROGENATION, TANTALUM), SHEETS, DUCTILITY, HYDROGEN, IMPURITIES, STRESSES, CRYOGENICS, TENSILE PROPERTIES, GRAIN STRUCTURES(METALLURGY)

Subject Categories : Metallurgy and Metallography

Distribution Statement : APPROVED FOR PUBLIC RELEASE