TWI

The development of a novel friction stir welding (FSW) monitoring for the in-process collection of tool force data is reported. The concept and features of this Advanced Rotating Tool Environment Monitoring and Information system (Artemis), based around an extensively instrumented rotating tool holder, are presented. The effects of tool probe features and design on overall weld quality, microstructure and weld cross-section, and on process torque, downforce and tool temperature were investigated. The impact of the shoulder and tool probe components on weld cross-section was assessed. Two FSW tool designs were studied: the MX-Triflute, comprising a plain tapered cone, thread and flute features, and the MX-Triflat, comprising a plain tapered cone, thread feature and three flats. The weld signatures of the different probe elements were examined and process results are presented.

8th International Symposium, 18-20 May 2010, Session 10A: Tool Designs, Paper 01