INFLUENCE OF THE CONFIGURATION OF RECONSTITUTED SPECIMENS ON FRACTURE TOUGHNESS CHARACTERISATION OF PRESSURE VESSEL STEELS

摘要

Specimen reconstitution techniques offer the possibility to obtain fracture toughness measurements when only small amounts of material are available. In order to obtain extra information from Charpy specimens, an electron-beam weld reconstitution method is established to obtain Compact Tension specimens from the broken halves of Charpy specimens. The validity of the fracture toughness characterisation is analysed by comparing J_R-resistance curves of specimens with insert and those of normalised specimens without insert.