APFIM characterization of 15Kh2MFA Cr-Mo-V and 15Kh2NMFA Ni-Cr-Mo-V type steels
作者： M.K Miller , R Jayaram , P.J Othen , G Brauer
DOI: 10.1016/0169-4332(94)90349-2
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摘要: Abstract A microstructural characterization of 15Kh2MFA Cr-Mo-V and 15Kh2NMFA Ni-Cr-Mo-V type steels that are used in the pressure vessels Russian VVER 440 1000 nuclear reactors, respectively, has been performed with use techniques atom-probe field-ion microscopy (APFIM) transmission electron microscopy. The microstructure these materials was found to be tempered martensite bainite. high number density coarse (≈ 50 ≈ 500 nm) blocky M7C3 carbides some inclusions were observed. In addition carbides, finer 10 nm diameter) approximately spherical MC also observed steel. Field-ion revealed lath boundaries both unirradiated reactor decorated an ultrathin semicontinuous film molybdenum-carbonitride precipitates. Atom-probe analysis a enrichment phosphorus at boundaries.
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