Size Effect of Additional Elements on Radiation Induced Grain Boundary Segregation Behavior in Austenitic Stainless Steel.

Control of phosphorus inter-granular segregation in ferritic steels

“…So Hf can trap easily vacancies, resulting in reduced mobility of vacancies and enhancement of vacancy-interstitial recombination in the matrix. In situ TEM observations of void and interstitial loop growth give support to this assumption [6,8]. Thus, Hf can suppress phosphorus segregation toward GB by decreasing the population of self-interstitials and vacancies.…”

“…The solute drag model [3,4] and rate theory [5] have been applied successfully to predict radiation-induced segregation (RIS). In other work, it was interesting to note that some oversized elements can suppress chromium depletion and nickel enrichment at grain boundaries in austenitic steel [6][7][8]. However, no study on the prevention of radiationinduced segregation in ferritic steel has yet been reported.…”

Effect of hafnium on radiation-induced inter-granular segregation in ferritic steel

“…It has been found that radiation-induced Cr depletion in austenitic steels and radiation-induced P enrichment in ferritic steels can be suppressed by oversized atom additions [3][4][5][6][7][8][9][10]. Ti, V, Nb, Ta, Zr, Hf and Pt were added to austenitic steels [3][4][5][6][7][8][9] and Hf to ferritic steel [10] to study the influence of oversized solute additions on radiation-induced segregation (RIS). Hf and Zr additions show the best suppression effect for Cr depletion in austenitic steels.…”