Abstract
Some researchers have carried out, from a dynamics point of view, the investigations for various aspects of end cracking in one side automatic welding. Especially, the many studies with respect to the relation of rotational distortion and end cracking have been done heartily, since this, end cracking is found to be a kind of hot cracking induced above 1, 200°C. So it is comfirmed that the opening displacement of groove in the vicinity of plate edge is important factor for end cracking.
In this paper, the authors give tensile load intentionally to the weld metal during solidification process on the assumption that the tack weld is melted and the groove is rapidly expanded, and discuss the effect of opening displacement and displacement rate on the end cracking behavior, from the viewpoint of the hypothesis of rotational distortion.
