Abstract
It is well known that the notch toughness of steel becomes low when it suffers plastic deformation. This fact has been obtained by many Charpy impact tests in which the specimens have plastic deformation in rolling direction of steel plate and the side notches are introduced in the direction perpendicular to the rolling direction. In this study, the influences of following factors on the notch toughness of structural steel SM490Y with plastic deformation of 0 to 10% are examined though the Charpy impact tests. These factors are direction of plastic deformation, notch direction and notch angle.
