The Mechanical Properties of Dissimilar Metal Welded Joint

Abstract

The present study was carried out to examin the effect of mechanical heterogeneity on the static tensile properties of dissimilar metal welded joint. To prepare test pieces, steel plates (Yield strength: 29.1 kg/mm², Ultimate strength: 35 kg/mm²) and Copper plates (Yield strength: 6.4 kg/mm², Ultimate strength: 24.1 kg/mm²) were welded by electron beam welding.
The results obtained are as follows:
(1) When the angle between loading line and weld line becomes small, the tensile strength of test piece is lower than that of copper.
(2) The large strain concentration appears at the neighborhood of weld line in copper when the angle between loading line and weld line is small.
(3) Four types of fracture mode were obtained in the dissimilar metal welded joint.