Physical Interpretation for the Upper Shelf Energy of Weld Zone in Charpy Impact Test

Abstract

The present study was carried out to clarify the physical interpretation for the upper shelf energy of weld zone in Charpy impact test. Standard Charpy impact test were conducted on the structural high tension steel with bead welding by electron beam weld.
The results obtained were as follows:
1) The upper shelf energy of weld zone in Charpy impact test was affected not only by the toughness of material under the notch root but also by the mechanical properties of base metal in the vicinity of weld zone.
2) It became clear that a large fraction of the upper shelf energy was associated with the plastic strain energy consumed to deform a specimen.