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The change in the structural-phase state and microhardness of the 67CoNi5Nb alloy while ion and electron beams processing

Authors: Скаков Мажын Канапинович, Рахадилов Бауыржан Корабаевич, Зарва Денис Борисович, Гулькин Александр Владимирович

Keywords: ионная имплантация, электронно-лучевая обработка, микротвердость, сплав

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The article shows the influence of ion implantation of nitrogen and electron-beam processing on structural-phase state and microhardness of a dispersion-hardening 67CoNi5Nb alloy. It is established that at the surface treatment of electronic and ion beams is the place to morphological changes, and changes in the elemental composition of the 67CoNi5Nb alloy. It is determined that in the result of treatment by nitrogen ions and electrons on the surface of a dispersion-hardening 67CoNi5Nb alloy formed fine inclusion due to surface segregation of niobium. It is shown that the
ion implantation leads to an increase in the microhardness to 10–50%, depending from dose of irradiation. It is determined that the surface microhardness of the 67CoNi5Nb alloy after electron irradiation increases almost to 2 times.

Ion-Induced Structural-Phase Transformations 
in Austenite Stainless Steel 12Cr18ni10Ti, AISI 316 and AISI 304

Authors: Верещак М.Ф., Манакова И.А., Бедельбекова К.А., Озерной А.Н., Бедельбекова К.А., Дегтярева А.С.

Keywords: ионная имплантация, спектроскопия, рентгеновский дифракционный анализ, радиационные повреждения

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In this paper the ion-induced structural-phase transformations in austenitic stainless steels 12Cr18Ni10Ti, AISI 316 and AISI 304 have been studied by the Mössbauer spectroscopy of conversion electrons, X-ray diffraction and scanning microscopy. It has been established, that the electronic structure of the Mössbauer atoms in stainless steels AISI 304 and AISI 316 are different. Consequently, molybdenum does not affect the short-range order of 57Fe in AISI 316 steel. Implantation of its own atoms (57Fe) in AISI 316 steel leads, as in case with AISI 304 and 12Cr18Ni10Ti steel, to martensitic transformations. Among three steels AISI 316 was found to be the most stable to the ion-induced structural phase transformations.