Structural Characterization of Highly Corrosion-resistant Steel

Abstract

Structural features of novel corrosion-resistant LC 200N steel were investigated. Mössbauer spectrometry was chosen as a principal method of investigation. Surface as well as bulk properties were studied using Conversion Electron Mössbauer Spectrometry and transmission technique, respectively. Complex behaviour of magnetic and non-magnetic phases was identified in the samples by these two techniques. Chemical composition was checked by neutron activation analysis and X-ray fluorescence technique. Structural arrangement was studied by scanning electron microscopy with energy dispersive spectrometry and transmission electron microscopy. They unveiled regions with fairly varied Cr concentrations. Basing on a simple model of two different Cr concentrations, the relative areas of the Mössbauer sextets were modelled by a linear combination of two binomial distributions.

Precipitation of oxide dispersion strength steels after long-term annealing at temperature of 475 °C

“…Development of ferritic-martensitic oxide dispersion strengthened (ODS) steels was paralleled by material research for fast reactors with the reduced swelling under higher neutron fluxes. The main advantage of ODS steels is their low neutron activation even at high neutron fluxes (up to 10 14 m −2 s −1 ) [22,23]. Along with the appearance of fusion reactor material programmes, ODS steels also became attractive for the use as base materials in the design of nuclear fusion facilities.…”

Microstructure of High‐Chromium Ferritic–Martensitic Steels for Next‐Generation Reactors

“…[1][2][3][4][5][6][7][8][9][10][11] Various types of alloys are potentially suitable for advanced (nuclear) applications; therefore, it is necessary to analyze suitable candidates using variety of experimental techniques in order to understand the microstructure and potential irradiation resistance of a given material. [12][13][14][15][16][17][18][19][20][21] The most common alloys used in the primary circuit of nuclear power plants are steels, where carbon, chromium, manganese, nickel, titanium, and other elements (additives) are added in order to improve their physical, chemical, and mechanical properties. [14,[22][23][24][25][26][27][28] Purposeful choice of construction material reflects the type of nuclear facility, i.e., the type of nuclear reactor or the type of coolant/cooling system.…”