Separation of Microstructural and Microchemical Effects in Irradiation Assisted Stress Corrosion Cracking using Post-irradiation Annealing

Fracture behavior of austenitic stainless steels irradiated in PWR

“…This strongly suggests that the underlying mechanisms for IG fracture differ between these conditions. The origin of the IG fracture in these two conditions is likely to be explained largely by deformation mode, based on knowledge on deformation and fracture mechanisms in irradiated stainless steels [2,[13][14][15][18][19][20][21][22][23][24][25][26]. Fig.…”

Influence of post irradiation annealing on the mechanical properties and defect structure of AISI 304 steel

“…, where t is the annealing time and D the iron self-diffusion coefficient given by D ¼ D 0 expðÀQ =kTÞ, with T the annealing temperature, k the Boltzmann constant, Q the migration energy equaling 2.95 eV and D 0 equals 4.9  10 À5 m 2 /s [10].…”

Evolution of Microstructure and Microchemistry in Cold-worked 316 Stainless Steels under PWR Irradiation

“…Interestingly, our previous study using the same tube materials irradiated to 25 dpa revealed that the post-irradiation annealing at 673-823 K caused an increase in the number density of 0 precipitates. 17) This may imply that a thermal process could be involved in the 0 precipitation although the details are not clear at this time. Since evolution of 0 precipitates can change the balance and flow of point defects, further studies are needed on their role on microstructures and microchemistry, although 0 precipitation may have a small influence on macroscopic properties due to lower density than dislocation components and cavities.…”

“…The materials examined were irradiated thimble tubes made of a cold-worked SUS 316 stainless steel, which were exposed to high neutron flux in fuel assemblies and have been widely used for IASCC studies at high doses. [13][14][15][16][17] Careful sampling enabled us to obtain data in various irradiation conditions due to the gradient of neutron flux and temperature along the height of the core. In this paper, the results of transmission electron microscopy (TEM) and microanalyses together with gas measurement and hardness measurements are described in the dose range of 0.7 to 73 dpa.…”