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National Repository of Grey Literature 2 records found  Search took 0.00 seconds. 
Tests of thermal and radiation embrittlement of reactor steel 15CH2MFA
 Dvořáková, M. ; Kadlecová, Jana ; Konop, R. ; Tomáš, Ivan ; Vértesy, G.
Results are presented of mechanical destructive and magnetic nondestructive tests of the 15Ch2MFA steel, used for pressure vessels of the VVER40 reactor type. Two series of samples were tested: (i) samples, embrittled by a special thermal processing, and (ii)samples, embrittled in a reactor by high fluences of neutron radiation. Results of mechanical impact Charpy tests are compared with results of Magnetic Adaptive Testing carried out on the two sample series. The existence of mutual correlation between the two types of examination indicates alternative of replacement of the mechanical destructive tests of classical surveillance samples by magnetic tests, which are nondestructive.
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Barkhausen noise testing of surface decarburization of steel
 Stupakov, Oleksandr ; Tomáš, Ivan ; Skrbek, L.
Magnetic Barkhausen noise technique was tested for applicability of non-destructive charaterization of the decarburized layer depth. A newly introduced parameter, Barkhausen noise coercivity, was proposed for practical use due to its sensitivity to the tested decarburization and its stability to the measurement conditions.
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