Grain boundary segregation in neutron-irradiated 304 stainless steel studied by atom probe tomography

Atomistic Analysis Of Radiation-Induced Segregation In Ion-Irradiated Stainless Steel 316

“…Thus, further analysis technique is needed to reveal the nature of the cluster in detail. Table 2 summarizes the compositions of the irradiation defects of the present work and previously reported APT results of SS irradiated under various conditions [17,18]. In our present study, Si and Ni are highly enriched, and the dislocation loop and the rounded cluster show a very high peak concentration of Si.…”

“…The rounded clusters showed the highest enrichment of Si, similar to our present results. On the other hand, the results of Toyama on SS304, irradiated with neutrons at 300 • C to a dose of 24 dpa, showed only two types of irradiation defects, namely rounded clusters and grain boundaries [18]. The clusters showed high enrichments of Si and Ni, while the grain boundaries showed modest RIS behavior.…”

“…The various types of radiation-induced defects were identified and the compositional characteristics were quantitatively provided with a wide view point. The measured concentrations were compared with values of the literature [17,18]. To estimate the RIS behavior, a basic modeling was established and compared with the literature.…”

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

“…No sharp diffraction spots were found, which indicates that the precipitates are in general randomly oriented with respect to the matrix, even though there is a preference to be close to the matrix orientation. Subsequent three dimensional atom probe tomography measurements by Toyama et al [11] on the same specimens show the formation of small Ni 3 Si precipitates (c 0 -precipitates) of the same size as these precipitates in the TEM images. Moreover, the lattice parameter of Ni 3 Si is in agreement with the observed lattice spacing in the diffraction pattern.…”

Magnetic and thermodynamic properties of face-centered cubic Fe–Ni alloys

“…% Ni and 20 at. % Cr [2,3], so that any methodology for modelling such steels should in the first place be able to model ternary Fe-Ni-Cr alloys in the composition range where neither of the constituent elements can be treated as impurity. An extra factor that must be taken into account when modelling iron-based alloys and steels is the fact that the phase stability of iron-based alloys is controlled by magnetism, for example magnetism stabilizes the ferritic body-centered cubic (bcc) phase of pure iron under ambient conditions.…”