Bt. Timofeev et Vv. Anikovsky, BRITTLE-FRACTURE TOUGHNESS - EXPERIMENTAL ESTIMATION OF RPV MATERIALSAND THEIR WELDS CONTAINING SHALLOW CRACKS, International journal of pressure vessels and piping, 57(3), 1994, pp. 297-304
This paper presents brittle fracture resistance results for types 15X2
MFA, 15X2NMFA steels and their weldments, produced by submerged are we
lding as applied to nuclear reactor VVER-440 and VVER-1000 pressure ve
ssels production and maintenance conditions. The fracture toughness/te
mperature dependence of these materials was determined for cracks with
the depth 0.1 (small) and 0.5 (standard) from specimen thickness. The
crack shape (through, semi-elliptical); material state (beginning and
end of service life), and the specimen production processing (presenc
e or absence of anticorrosive cladding) were also varied. The consider
ation of real crack size enables one to sufficiently increase the brit
tle fracture resistance of reactor materials and their welded joints.
This fact should be used in the performance of control calculations.