PSI - Issue 43

5

Sergiy Kotrechko et al. / Procedia Structural Integrity 43 (2023) 228–233 Author name / Structural Integrity Procedia 00 (2022) 000 – 000

232

Fig. 1. The effect of temperature T and plastic strain value _

e on the intensity of CN forming ρ: _

e is the equivalent plastic strain; C e is the

critical value of strain ( C e =0.02).

Fig. 2. (Color online). The temperature dependences of fracture toughness for RPV steel ( a ) and cast low-alloyed manganese steel ( b )  represent the experimental values; lines are the calculation results (solid dark-yellow lines are the results of calculation taking into account changes in density CN density ρ, dashed black lines are the sa me at the constant values of ρ)) .

Fig. 3. Dependence of fracture probability on the magnitude of fracture toughness (for RPV steel, T=-120 0 C), calculated accounting for change in the crack nuclei bulk density  (  ) and at a constant value of  (  ).