Abstract
The results from the first and second interim examinations of a test to measure irradiation creep in bending of 20 percent cold-worked AISI 316 stainless steel are presented. These low-fluence results indicate that irradiation creep in bending exhibits a larger primary creep component of the total strain as compared with creep in biaxial pressurized tubes of the same heat of material, but the secondary creep rates in the two cases appear to be similar. The data also indicate that the bending strains have a linear fluence and stress dependency, and strains measured on beams fabricated parallel to and transverse to the direction of cold work are similar, indicating that material texture anisotropy does not effect irradiation creep in bending. Higher-fluence data are needed to compare precisely irradiation creep in the bending and biaxial stress states so that the applicability can be ascertained for design correlations based on pressurized tube data to predict in-reactor bending deformations of liquid-metal fast-breeder reactor (LMFBR) core components.
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