SYMPOSIA PAPER Published: 01 January 1987
STP28111S

Upper and Lower Bound Crystal Plastic Modelling of Creep Loci of Zircaloy

Source

Biaxial creep of Zircaloy was examined in the cold-worked and recrystallized conditions in terms of creep loci at constant creep dissipation. Model predictions were made using the lower and upper bounding schemes along with the statistical averaging of crystallite behavior through the crystallite orientation distribution functions (CODF). Textural modifications following recrystallization treatment were found to have a negligible effect on the slip predictions based on easy slip on basal, prism, or pyramidal planes. The differences in the deformation behaviors of the cold-worked stress-relieved (CW-SR) and recrystallized materials were shown to arise from changes in the slip mode, basal slip being dominant in CW-SR and prism slip in recystallized materials. Deviations between the experimental results and model predictions brought out the importance of pyramidal slip in biaxial creep of Zircaloy materials. Dominance of basal slip in the CW-SR material is believed to be due to the hardening of the prismatic planes during fabrication.

Author Information

Murty, KL
North Carolina State University, Raleigh, NC
Mahmood, ST
North Carolina State University, Raleigh, NC
Adams, BL
Brigham Young University, Provo, UT
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Details
Developed by Committee: B10
Pages: 120–134
DOI: 10.1520/STP28111S
ISBN-EB: 978-0-8031-5004-1
ISBN-13: 978-0-8031-0935-3