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We present a microstructural study of a surveillance test specimen from a reactor pressure vessel steel of a Russian-type nuclear reactor after neutron irradiation, post-irradiation annealing and re-irradiation, using atom probe tomography (APT) and positron annihilation spectroscopy (PAS). The APT results showed the formation of Cu-rich solute nano-clusters (CRCs) during the initial irradiation and...
The unusual influence of strain rate on fracture behavior at 77 K has been studied by tension tests for three high nitrogen bearing austenitic steels, 19Mn-17Cr-0.5N (A1), 19Mn-19Cr-0.8N (A3) and 17Cr-13Ni-2Mo-0.5N (D3, all in mass%). Specimens of A1 steel are fractured in a brittle mode by a slipping-off mechanism in a strain rate range between 2.7 10 -4 /s and 2.7 10 - ...
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