Effect of Aluminum Ion Irradiation on Chemical and Phase Composition of Surface Layers of Rolled AISI 321 Stainless Steel
Commercial rolled AISI 321 stainless steel samples were irradiated with Al<sup>+</sup> ions with an energy of 80 keV and fluence of 10<sup>17</sup> ion/cm<sup>2</sup>. The effect of Al implantation on the chemical and phase composition of the steel surface layer w...
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| Autores principales: | , , , , , , , , |
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| Formato: | article |
| Lenguaje: | EN |
| Publicado: |
MDPI AG
2021
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| Materias: | |
| Acceso en línea: | https://doaj.org/article/3019e859694d44279228fe7bdf99140e |
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| Sumario: | Commercial rolled AISI 321 stainless steel samples were irradiated with Al<sup>+</sup> ions with an energy of 80 keV and fluence of 10<sup>17</sup> ion/cm<sup>2</sup>. The effect of Al implantation on the chemical and phase composition of the steel surface layer was studied by X-ray electron spectroscopy and grazing beam mode of X-ray diffraction analysis. A thin surface layer down to a depth of 30 nm after Al<sup>+</sup> ions implantation consists mainly of metal oxides. In the near-surface layers of 5 nm in depth, a noticeable depletion in chromium and nickel was observed. A surface layer (up to 0.5 µm) of non-irradiated steel, in addition to the f.c.c. austenite γ-phase, consists of up to 20 vol% of the b.c.c. α′-phase, which formed at rolling as a result of mechanical deformation. Al implantation results in the significant increase in the α′-phase amount in the surface layer at a depth up to 2 µm. It is indicated that the observed γ → α′ transformation at ion irradiation proceeds predominantly as a result of the effect of post-cascade shock waves, but not as a result of the surface layer chemical composition changes. |
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