Irradiation of Fe-Mn Supersaturated Solid Solution with Ions of Various Atomic Masses (Ar+, Xe+) and Analysis of the Role of Nanosized Dynamic Effects in the Activation Processes of Long-Range Type

5th International Congress on Energy Fluxes and Radiation Effects 2016

Ovchinnikov, V.V.^1,2 ; Makhin'Ko, F.F.^1 ; Semionkin, V.A.^1,2 ; Shalomov, K.V.^1,2

Institute of Electrophysics, Ural Branch, Russian Academy of Sciences, Amundsena street 106, Yekaterinburg

620016, Russia^1

Ural Federal Technical University, First President of Russia B.E. Yeltsin, Mira street 19, Yekaterinburg

620002, Russia^2

关键词: Activation process;    Dynamic effects;    Irradiation dose;    Long range effects;    Low temperatures;    Near-surface layers;    Ssbauer spectroscopies;    Supersaturated solid solutions;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/830/1/012086/pdf
DOI  :  10.1088/1742-6596/830/1/012086

来源: IOP

【 摘 要 】

A multiple increase in the atom mobility in metastable supersaturated (quenched from 850 °C) Fe-8.16 at % Mn solid solution is detected at temperatures less than 250°C under irradiation with 5-keV Ar+and Xe+ions of different masses. The irradiation-induced atom redistribution in the entire volume of foils 30 μm thick at a projected Ar+and Xe+ion ranges as much as 20-30 nm only is found and studied by the transmission Mössbauer spectroscopy. Long-range effects at low irradiation doses and anomalously low temperatures are attributed to "radiation shaking" of metastable media with post-cascade solitary waves in contrast to thermally stimulated radiation-enhanced processes in the narrow nanoscale near-surface layers of the alloy. It has been shown that heavier Xe+ions at higher irradiation doses have a stronger impact on the solid solution than Ar+ions.