Temperature Dependence of the Fracture Toughness and the Cleavage Fracture Strength of a Pressure Vessel Steel

H Kotilainen

doi:10.1520/STP36980S

SYMPOSIA PAPER Published: 01 January 1980

STP36980S

Temperature Dependence of the Fracture Toughness and the Cleavage Fracture Strength of a Pressure Vessel Steel

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A new model for the temperature dependence of the fracture toughness has been sought. It is based on the yielding processes at the crack tip, which are thought to be competitive with fracture. Using this method a good correlation between measured and calculated values of fracture toughness has been found for a Cr-Mo-V pressure vessel steel as well as for A533B. It has been thought that the application of this method can reduce the number of surveillance specimens in nuclear reactors.

A method for the determination of the cleavage fracture strength has been proposed. It can be measured either with low temperature tensile tests or with slow bend tests of Charpy V-notch specimens.

Author Information

Kotilainen, H

Valtion Teknillinen Tutkimuskeskus, Technical Research Centre of Finland, Metals Laboratory, Espoo, Finland

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Developed by Committee: E08

Pages: 352–367

DOI: 10.1520/STP36980S

ISBN-EB: 978-0-8031-4770-6

ISBN-13: 978-0-8031-0363-4

Temperature Dependence of the Fracture Toughness and the Cleavage Fracture Strength of a Pressure Vessel Steel

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