Anwendung des Instrumentierten Kerbschlagbiegeversuch zur Ermittlung von Referenztemperaturen nach dem Master-Curve-Konzept


Anwendung des Instrumentierten Kerbschlagbiegeversuch zur Ermittlung von Referenztemperaturen nach dem Master-Curve-Konzept

Viehrig, H.-W.; Böhmert, J.; Dzugan, J.

The instrumented impact test is suitable for the determination of fracture mechanical pa-rameters. In this paper the determination of the dynamic fracture toughness values in the lower ductile-to-brittle transition region is presented. The fracture toughness is determined at the onset of cleavage fracture and evaluated by the Master Curve (MC) concept. The MC concept allows to quantify the variation of fracture toughness with the temperature within the lower ductile-to-brittle transition region. Limit curves of fracture toughness for defined fail-ure probabilities and a reference temperatures can be determined using this method. This paper presents the application of the master curve concept to the reference temperature de-termination through the thickness of reactor pressure vessel (RPV) steel plate. The reference temperatures determined with dynamic fracture toughness values (T0dy) are compared with quasi-static reference temperatures (T0st) and Charpy-V transition temperatures (TT). The T0dy, T0st and TT increase from the surface to the middle of the RPV steel plate. Compared with T0st, the T0dy values are higher approximately 70 to 90 K.

Keywords: reactor pressure vessel steel; instrumented impact testing; J integral; fracture toughness; dynamic loading; Master Curve

  • Materialwissenschaft und Werkstofftechnik, Vol. 32, No. 6, June 2001, pp. 568-573

Permalink: https://www.hzdr.de/publications/Publ-3878
Publ.-Id: 3878