Effects of microstructure on light ion irradiation creep in nickel
The concept of inhomogeneous slip or localized deformation is introduced to account for a weak dependence of irradiation creep on initial microstructure. Specimens of pure Ni with three different microstructures were irradiated at 473/sup 0/K with 15 to 17 MeV deuterons in the PNL light ion irradiation creep apparatus. A dispersed barrier model for climb-glide creep was unable to account for the observed creep rates and creep strains. The weak dependence on microstructure was consistent with the SIPA creep mechanism but a high stress enhanced bias had to be assumed to account for the creep rates. Also, SIPA was unable to account for the observed creep strains. The modeling utilized rate theory calculations of point defect fluxes and transmission electron microscopy for sink sizes and densities.
- Research Organization:
- Pacific Northwest Lab., Richland, WA (USA)
- DOE Contract Number:
- AC06-76RL01830
- OSTI ID:
- 6618263
- Report Number(s):
- PNL-SA-10335; CONF-821049-5; ON: DE83003467
- Country of Publication:
- United States
- Language:
- English
Similar Records
Low dose irradiation creep of pure nickel. [17 or 15 MeV deuterons]
Low dose irradiation creep of pure nickel. [17 or 15 MeV deuterons]
Related Subjects
360106* -- Metals & Alloys-- Radiation Effects
BEAMS
CREEP
CRYSTAL STRUCTURE
DEUTERON BEAMS
ELEMENTS
ENERGY RANGE
HIGH TEMPERATURE
ION BEAMS
MECHANICAL PROPERTIES
METALS
MEV RANGE
MEV RANGE 10-100
MICROSTRUCTURE
NICKEL
PHYSICAL RADIATION EFFECTS
RADIATION EFFECTS
SLIP
TRANSITION ELEMENTS