title: Structural Transformations in Austenitic Stainless Steel Induced by Deuterium Implantation: Irradiation at 295 K.
abstract: Deuterium thermal desorption spectra were investigated on the samples of austenitic steel 18Cr10NiTi pre-implanted at 295 K with deuterium ions in the dose range from 8 × 10(14) to 2.7 × 10(18) D/cm(2). The kinetics of structural transformation development in the steel layer was traced from deuterium thermodesorption spectra as a function of deuterium concentration. Three characteristic regions with different low rates of deuterium amount desorption as the implantation dose increases were revealed: I-the linear region of low implantation doses (up to 1 × 10(17) D/cm(2)); II-the nonlinear region of medium implantation doses (1 × 10(17) to 8 × 10(17) D/cm(2)); III-the linear region of high implantation doses (8 × 10(17) to 2.7 × 10(18) D/cm(2)). During the process of deuterium ion irradiation, the coefficient of deuterium retention in steel varies in discrete steps. Each of the discrete regions of deuterium retention coefficient variation corresponds to different implanted-matter states formed during deuterium ion implantation. The low-dose region is characterized by formation of deuterium-vacancy complexes and solid-solution phase state of deuterium in the steel. The total concentration of the accumulated deuterium in this region varies between 2.5 and 3 at.%. The medium-dose region is characterized by the radiation-induced action on the steel in the presence of deuterium with the resulting formation of the energy-stable nanosized crystalline structure of steel, having a developed network of intercrystalline boundaries. The basis for this developed network of intercrystalline boundaries is provided by the amorphous state, which manifests itself in the thermodesorption spectra as a widely temperature-scale extended region of deuterium desorption (structure formation with a varying activation energy). The total concentration of the accumulated deuterium in the region of medium implantation doses makes 7 to 8 at.%. The resulting structure shows stability against the action of deuterium ion implantation. This manifests itself in a nearly complete ceasing of deuterium accumulation from a newly implanted dose (radiation-resistant structure).
authors.affiliation: National Science Center "Kharkiv Institute of Physics and Technology", 1, Akademichna St., UA-61108, Kharkiv, Ukraine. morozov@kipt.kharkov.ua.
authors.forename: Oleksandr
authors.initials: O
authors.lastname: Morozov
authors.affiliation: National Science Center "Kharkiv Institute of Physics and Technology", 1, Akademichna St., UA-61108, Kharkiv, Ukraine.
authors.forename: Volodymir
authors.initials: V
authors.lastname: Zhurba
authors.affiliation: National Science Center "Kharkiv Institute of Physics and Technology", 1, Akademichna St., UA-61108, Kharkiv, Ukraine.
authors.forename: Ivan
authors.initials: I
authors.lastname: Neklyudov
authors.affiliation: National Science Center "Kharkiv Institute of Physics and Technology", 1, Akademichna St., UA-61108, Kharkiv, Ukraine.
authors.forename: Oleksandr
authors.initials: O
authors.lastname: Mats
authors.affiliation: National Science Center "Kharkiv Institute of Physics and Technology", 1, Akademichna St., UA-61108, Kharkiv, Ukraine.
authors.forename: Viktoria
authors.initials: V
authors.lastname: Progolaieva
authors.affiliation: National Science Center "Kharkiv Institute of Physics and Technology", 1, Akademichna St., UA-61108, Kharkiv, Ukraine.
authors.forename: Valerian
authors.initials: V
authors.lastname: Boshko
keywords: Austenitic stainless steel; Deuterium; Ion implantation; Irradiation at 295 K; Structural transformations; TDS; TEM
references.citation: Nanoscale Res Lett. 2015 Mar 28;10:154
references.pmid: 25852440