Friction Stir Welding of Copper and Copper Alloys(Physics, Processes, Instruments & Measurements, INTERNATIONAL SYMPOSIUM OF JWRI 30TH ANNIVERSARY)

概要

論文の詳細を見る
The characteristics of structure and mechanical properties of friction stirred welds of oxygen free copper (OFC) and 60%Cu-40%Zn copper alloy (60/40 brass) were investigated. The defect free welds were obtained in a relatively wide range of welding conditions and tool rotation speeds from 1000 to 1500rpm. The microstructures of stirred zones (SZ) of OFC and 60/40 brass showed grains a little smaller and grains a great deal finer compared with those of the base metals respectively. The mean hardness values within the SZ of OFC welds were almost the same or slightly lower than that of the base metal. On the other hand, the hardness values for 60/40 brass were much higher than that of the base metal. The maximum hardness values in the SZ increased with a decrease in heat input. The tensile properties of all SZ showed a relative correspondence to the variation of the hardness values in the SZ.