Irradiation creep by climb-enabled glide of dislocations resulting from preferred absorption of point defects
A mechanism of irradiation creep is proposed that arises from the climb-enabled glide of dislocations due to stress-induced preferred absorption of radiation-produced point defects. This creep component we term preferred absorption glide, PAG. PAG-creep operates in addition to the previously studied components of creep from climb by stress-induced preferred absorption, PA-creep, and the climb-enabled glide due to excess absorption of interstitials on dislocations during swelling, l-creep. A formulation of the various climb and climb-enabled glide processes is presented which includes earlier results. PAG-creep is comparable in magnitude to PA-creep in the parameter range of applications. While the PA-creep rate and the l-creep rate are linear in stress, the PAG creep rate is quadratic stress and thus dominates at high stress.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- DOE Contract Number:
- W-7405-ENG-26
- OSTI ID:
- 6886274
- Report Number(s):
- ORNL/TM-6443; TRN: 78-018808
- Country of Publication:
- United States
- Language:
- English
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