EFFECT OF TEMPERATURE ON MECHANICAL PROPERTIES OF URANIUM

Journal Article · Mon Jan 01 04:00:00 EST 1962 · Tr. Inst. Met. im. A.A. Baikova, Akad. Nauk SSSR

OSTI ID:4714175

Savitskii, E M; Tylkina, M A; Terekhova, V F

S>Mechanical properties of hot-rolled U (99.7% U and 0.26 to 0.25% C) were tested at-196 to 1100 deg C. Uranium hardness was found to drop from 332 kg/ mm/sup 2/ at -196 deg C to 21 for alpha -uranium was found to be 0.9 x 10/sup -3/ . Cold working with 50% reduction increased the room temperature hardness by 70 kg/mm/sup 2/. The ductility of U increased and its resistance to deformation decreased with increasing temperature. In upsetting at 50 mm/min, cylindrical specimens 9.8 mm in dia and 15 mm long can withstand 33% reduction at 20 deg C, 60 to 75% at 500 to 600 deg C, and 97% at 850 deg C. To obtain a reduction of 10% at 100 deg C a stress of 90 kg/ mm/sup 2/ is needed, but only 1 kg/mm/sup 2/ at 800 deg C. The tensile strength at room temperature was found be 82 kg/mm/ sup 2/. elongation, 2%; and reduction of area, 4%. With increasing temperature the tensile strength decreased continuously,; elongation and reduction first increase, drop somewhat at 760 deg C, reach a maximum ( approximates 35% elongation, and 100% reduction of area) at approximates 1000 deg C, and then drop sharply. The notch toughness of U at room temperature is low (1.7 kg.m/ cm/ sup 2/); it rises to 7.3 at 600 deg C, drops to 0.5 at 750 deg C, and increases to approximates 12 kg-m/cm/sup 2/ at approximates 850 deg C. The same temperature dependence was observed in impact upsetting. (TCO)

• Research Organization: Originating Research Org. not identified
• NSA Number: NSA-17-027877
• OSTI ID: 4714175
• Journal Information: Tr. Inst. Met. im. A.A. Baikova, Akad. Nauk SSSR, Journal Name: Tr. Inst. Met. im. A.A. Baikova, Akad. Nauk SSSR Vol. Vol: No. 11
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

CARBIDES
DEFORMATION
DUCTILITY
HARDNESS
HOT WORKING
MEASURED VALUES
MECHANICAL PROPERTIES
METALS, CERAMICS, AND OTHER MATERIALS
ROLLING
STRESSES
TEMPERATURE
TENSILE PROPERTIES
URANIUM