Impact energy relationships for directly rolled uranium strip

Technical Report · Tue Aug 26 04:00:00 EDT 1986

OSTI ID:6986413

Jackson, R J; Hammetter, J R

Charpy V-notch impact energies were obtained from thermomechanically processed uranium strip. The thermomechanical process to improve material properties was preheating a cast ingot at 630/sup 0/C and rolling it directly to final gauge on a nonheated mill. The degree of strengthening induced in the strip was varied by controlling the rate of cooling during rolling, and, hence the final pass temperatures. A direct correlation between rate of cooling during rolling and impact energy was found. Tensile properties and hardness were also obtained from the rolled strip and correlated with impact energies. A direct correlation was found between impact energies and ultimate tensile strength, tensile elongation and reduction-in-area, and with indentation hardness. It is surprising that thermomechanically processed strip with the higher hardness, ultimate tensile strength, and elongation, also had the higher impact energy. Thus, it was concluded that warm and cold rolling deformations significantly enhance notched-bar impact toughness as well as the tensile strength and hardness of unalloyed uranium. 11 figs., 6 tabs.

• Research Organization: Rockwell International Corp., Golden, CO (USA). Rocky Flats Plant
• DOE Contract Number: AC04-76DP03533
• OSTI ID: 6986413
• Report Number(s): RFP-3862; ON: DE87005789
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360103* -- Metals & Alloys-- Mechanical Properties
ACTINIDES
CHARPY TEST
CORRELATIONS
DESTRUCTIVE TESTING
ELEMENTS
FABRICATION
HARDNESS
HEAT TREATMENTS
IMPACT TESTS
MATERIALS TESTING
MATERIALS WORKING
MECHANICAL PROPERTIES
MECHANICAL TESTS
METALS
NOTCHES
ROLLING
SHEETS
TENSILE PROPERTIES
TESTING
THERMOMECHANICAL TREATMENTS
URANIUM