THE ACTIVATION ENERGIES FOR CREEP OF ZIRCALOY-2

Technical Report · Thu Mar 01 04:00:00 EST 1962

OSTI ID:4828462

Holmes, J J

The activation energies for creep of Zircaloy-2 at stresses between 20,000 and 30,000 psi at 50 to 500 deg C were determined by the temperature cycle method. Results show that at least three creep processes, each characterized by a different activation energy, are operative in the range of stresses and temperatures studied. Between 50 and 285 deg C, the upper limit depending on stress, creep is cortrolled by a combination of dislocation climb and one or more intersection processes. Above 285 deg C creep is controlled dislocation climb which is characterized by an activation energy of 58,500 cal/mole. Superimposed on the climb and intersection processes is a third process eharacterized by an activation energy peak. The mechanism producing the peak is rationalized in terms of a dislocation pinning mechanism. (auth)

• Research Organization: General Electric Co. Hanford Atomic Products Operation, Richland, Wash.
• DOE Contract Number: AT(45-1)-1350
• NSA Number: NSA-16-021033
• OSTI ID: 4828462
• Report Number(s): HW-70151
• Country of Publication: United States
• Language: English

Related Subjects

ACTIVATION ENERGY
CREEP
DEFECTS
DISLOCATIONS
METALS, CERAMICS, AND OTHER MATERIALS
PRESSURE
STRESSES
TEMPERATURE
THERMODYNAMICS
ZIRCALOY