Abstract
This paper describes about the joint properties and its improvement of A5052 autocompleting friction welded joint, that welding method was developed by authors. The fixed specimen had the weld faying surface of 10mm with the overhanging length of 15 or 5mm, and the joint was made with a friction speed of 27.5s^<-1> and a friction pressure of 60 or 80MPa. Then, the effect of the bottom of the grooves (groove bottom thickness) for the insert piece on the joining phenomena and joint properties were investigated. As a conclusion, the joint had 100% joint efficiency with the base metal fracture at the groove bottom thickness of 1.4mm and the fixed specimen overhanging length of 5mm which was made at a friction pressure of 80MPa, although it did not achieve 100% joint efficiency at a friction pressure of 60MPa.
