Phase Composition of 316L Stainless Steel after Electron-Beam Irradiation Followed by Chromium Ion Implantation


Phase Composition of 316L Stainless Steel after Electron-Beam Irradiation Followed by Chromium Ion Implantation

Pryadko, E. L.; Reuther, H.; Shevchenko, N.; Markov, A. B.; Kolitsch, A.

In this work, samples of 316L, an austenite stainless steel, have been irradiated with a low-energy high-current electron beam of microsecond duration after that these samples were implanted at 150 keV by chromium ions. Implantation doses varied between 2.0 ⋅ 1016 and 2.0 ⋅ 1017 ions/cm2. The structure of the irradiated and implanted layer was examined by grazing incidence X-ray diffraction analysis. At 2.0 ⋅ 1016 ions/cm2 X-ray diffraction analysis of the phase composition in the surface layer revealed no difference between initial and irradiated-implanted samples. Above 2.0 ⋅ 1016 ions/cm2 a new bcc ferrite structure appeared. Higher implantation dose leads to a larger fraction of the ferritic phase. Irradiation with a low-energy high-current electron beam (LEHCEB) followed by ion beam implantation results in complete dissolution of inclusions and leads to the formation of ompletely homogeneous surface layer. It was also revealed that the surface layer homogeneity doesn't depend on implantation dose.

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