Three-dimensional visualization of material flow in FSW by X-ray radiography

摘要

Material flow during friction stir welding is the most important phenomenon to obtain sound joints. However, it is still not fully understood despite many investigations and models. In this study, the material flow is three-dimensionally visualized by X-ray radiography using a tiny spherical tungsten tracer. The movement of the tracer during the friction stir welding is observed by two pairs of x-ray transmission real-time imaging systems. The three-dimensional material flow is obtained by following the locus of the tracer.