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Microstructural investigation of low‐dose neutron irradiation effects in martensitic steels for nuclear application by means of small‐angle neutron scattering
Author(s) -
Lindau Rainer,
May Roland P.,
Valli Monica,
Coppola Roberto,
Möslang Anton
Publication year - 2007
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s0021889807005110
Subject(s) - tempering , materials science , irradiation , martensite , neutron , small angle neutron scattering , neutron scattering , small angle scattering , scattering , neutron temperature , neutron flux , neutron irradiation , microstructure , analytical chemistry (journal) , radiochemistry , crystallography , metallurgy , nuclear physics , optics , chemistry , physics , chromatography
The microstructural effect of low‐dose neutron irradiation and subsequent high‐temperature tempering in the reduced activation ferritic/martensitic steel F82H‐mod. (7.73 Cr, 0.09 C, 0.08 Mn, 0.19 V, 2.06 W, 0.02 Ta, wt%, bal. Fe) has been studied using small‐angle neutron scattering (SANS). The investigated samples were irradiated with thermal neutrons at 523 K, to dose levels of 2.4 displacements per atom then tempered for 2 h at 1043 K. The SANS measurements were carried out at the D22 instrument of the High Flux Reactor at the Institut Max von Laue–Paul Langevin, Grenoble, France. The differences observed in nuclear and magnetic small‐angle neutron scattering cross‐sections after subtraction of the reference sample from the irradiated one suggest that the irradiation and the subsequent post‐irradiation tempering produce the growth of non‐magnetic precipitates; the results are also compared with those obtained on other ferritic/martensitic steels, with different chemical composition, irradiated under the same conditions.