SYMPOSIA PAPER Published: 01 January 1980
STP27454S

Fast Fracture Toughness and Crack Arrest Toughness of Reactor Pressure Vessel Steel

Source

Crack propagation and arrest measurements have been made using six pressure vessel steels and a submerged-arc weldment. The base-metal crack arrest toughness, KIm, is found to increase linearly with temperature above nil-ductility transition (NDT), and between NDT and (NDT + 100°C) is substantially greater than KIR. NDT is found to be a more consistent reference temperature than room temperature NDT (RTNDT). It is suggested that the absolute value of KIm at any temperature is composed of cleavage and dimpled-rupture contributions, with regions of dimpled rupture being contained in shear walls normal to the crack plane and parallel to the direction of crack travel. Shear walls which do not completely fracture are the source of unbroken ligaments observed on the fracture surface. The arrest toughness of the weldment is significantly lower than that of the baseplate and displays little evidence of unbroken ligaments or shear walls.

Author Information

Hahn, GT
Vanderbilt University, Nashville, Tenn
Hoagland, RG
Vanderbilt University, Nashville, Tenn
Lereim, J
Det norske Veritas, Oslo, Norway
Markworth, AJ
Battelle Columbus Laboratories, Columbus, Ohio
Rosenfield, AR
Battelle Columbus Laboratories, Columbus, Ohio
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Details
Developed by Committee: E08
Pages: 289–320
DOI: 10.1520/STP27454S
ISBN-EB: 978-0-8031-4779-9
ISBN-13: 978-0-8031-0317-7