The effect of alloying elements on the vacancy defect evolution in electron-irradiated austenitic Fe–Ni alloys studied by positron annihilation

Effects of solute atoms on evolution of vacancy defects in electron-irradiated Fe–Cr-based alloys

“…The irradiation procedure at RT has been described elsewhere [18]. The maximum electron fluence was 2 Â 10 23 m À2 .…”

“…Changes in the shape of the ACAR spectra were characterized by the standard S-parameter [18]. The S-parameter is defined as the ratio of the low-momentum (p z 6 3 Â 10 À3 m 0 c) region to the total region, respectively.…”

Role of intermetallic nanoparticles in radiation damage of austenitic Fe–Ni-based alloys studied by positron annihilation

“…In this case the vacancy accumulation in aged alloys will more differ from one in quenched alloys. We have shown earlier [29,30] that Al and Ti in Fe-Ni-based alloys interact with vacancies that results in enhancement of vacancy accumulation. It seems this interaction reduces the effect of intermetallic particles on defect evolution at lower temperatures.…”

Study of the Properties of Transition Metals and Alligations on the Basis of Major data of the Method of Positron Annihilation Spectroscopy

“…Так в работах [18,19], выполненных методом ВРАФ, показано, что при флюенсе нейтронов 3,3•10 20 см -2 в аналогичных сталях практически все позитроны захватываются дефектами. Увеличение концентрации позитрончувствительных дефектов с ростом флюенса электронов в сплавах Fe-Ni, Fe-Ni-Al, Fe-Ni-Si наблюдалось также по изменению S-параметра (доплеровского уширения аннигиляционной линии) в работе [26]. В работе [27] показано, что S-параметр характеризует концентрацию вакансионных кластеров малых размеров.…”