Publication detail

R-Curves and Fracture Toughness Transition Behaviour at Static, Rapid and Impact Loading of Cr-Ni-Mo-V Reactor Pressure Vessel Steel

HOLZMANN, M. MAN, J. VÁLKA, L. VLACH, B.

English title

R-Curves and Fracture Toughness Transition Behaviour at Static, Rapid and Impact Loading of Cr-Ni-Mo-V Reactor Pressure Vessel Steel

Type

journal article - other

Language

en

Original abstract

The fracture toughness of Cr-Ni-Mo-V reactor pressure vessel steel was investigated over a wide temperature range. In the upper shelf fracture toughness region, R-curves were determined using large SEN bending specimens and small side-grooved precracked Charpy sepecimens. Two approaches were used for the evaluation of the fracture toughness scatter in the transition and in the lower shelf fracture toughness region: the exponential function with a least-squares regression procedure for a fracture toughness-temperature data and Weibull statistics for a fracture toughness data set obtained at the given temperature. The investigation of the influence of loading rate, ranging from 1 . 0 MPa m(1/2)s(-1) (static) to 3 X 10(4) MPa m(1/2) s(-1) (most rapid), on the behaviour of fracture toughness has shown a shift of cleavage/fibrous transition temperature by 60 degrees C. In contrast to that, at impact loading using a precracked Charpy specimen (K-1 = 2 X 10(5) MPa m(1/2) s(-1)) the shift of this transition temperature was only 30 degrees C, and a sudden transition of fracture toughness occurred from the lower shelf to the upper shelf toughness region.

English abstract

The fracture toughness of Cr-Ni-Mo-V reactor pressure vessel steel was investigated over a wide temperature range. In the upper shelf fracture toughness region, R-curves were determined using large SEN bending specimens and small side-grooved precracked Charpy sepecimens. Two approaches were used for the evaluation of the fracture toughness scatter in the transition and in the lower shelf fracture toughness region: the exponential function with a least-squares regression procedure for a fracture toughness-temperature data and Weibull statistics for a fracture toughness data set obtained at the given temperature. The investigation of the influence of loading rate, ranging from 1 . 0 MPa m(1/2)s(-1) (static) to 3 X 10(4) MPa m(1/2) s(-1) (most rapid), on the behaviour of fracture toughness has shown a shift of cleavage/fibrous transition temperature by 60 degrees C. In contrast to that, at impact loading using a precracked Charpy specimen (K-1 = 2 X 10(5) MPa m(1/2) s(-1)) the shift of this transition temperature was only 30 degrees C, and a sudden transition of fracture toughness occurred from the lower shelf to the upper shelf toughness region.

Released

01.01.1995

ISSN

0308-0161

Journal

The International Journal of Pressure Vessels and Piping

Volume

62

Number

1

Pages from–to

39–47

Pages count

9

BIBTEX


@article{BUT72710,
  author="Miloslav {Holzmann} and Jiří {Man} and Libor {Válka} and Bohumil {Vlach},
  title="R-Curves and Fracture Toughness Transition Behaviour at Static, Rapid and Impact Loading of Cr-Ni-Mo-V Reactor Pressure Vessel Steel",
  journal="The International Journal of Pressure Vessels and Piping",
  year="1995",
  volume="62",
  number="1",
  month="January",
  pages="39--47",
  issn="0308-0161"
}