Grain growth and the recrystallized grain size for the uranium-7. 4 weight percent niobium alloy

Technical Report · Fri Jun 17 04:00:00 EDT 1988

OSTI ID:7033347

Jackson, R J; Thomas, R L ^[1]

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1. ed.

The recrystallized gamma grain size and grain-growth kinetics were determined for the uranium-7.4 wt% niobium alloy (17.0 at.%). It was found that metal deformation is necessary for grain refinement in this alloy. The alloy was studied under three conditions: (1) the percent cold reduction and annealing temperature were held constant while the time at temperature was varied; (2) the percent cold reduction and annealing time were held constant while the annealing temperature was varied; and (3) the percent cold reduction was varied while the annealing time and temperature were held constant. The recrystallized gamma gain size was equal to or less than eight microns for the moderately worked U-7.4 wt% Nb alloy. The grain-growth exponent was 0.33 at 700/degree/C. The activation energy for grain growth was 7 kcal per mole. 17 refs., 8 figs., 1 tab.

• Research Organization: Rockwell International Corp., Golden, CO (USA). Rocky Flats Plant
• DOE Contract Number: AC04-76DP03533
• OSTI ID: 7033347
• Report Number(s): RFP-4156; ON: DE88013616
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102* -- Metals & Alloys-- Structure & Phase Studies
360103 -- Metals & Alloys-- Mechanical Properties
ACTINIDE ALLOYS
ACTIVATION ENERGY
ALLOYS
ANNEALING
CRYSTAL STRUCTURE
ENERGY
EQUATIONS
GRAIN BOUNDARIES
GRAIN GROWTH
GRAIN SIZE
HEAT TREATMENTS
MICROSTRUCTURE
NIOBIUM ALLOYS
RECRYSTALLIZATION
SIZE
URANIUM ALLOYS
URANIUM BASE ALLOYS