Radioscopy of remnant joint line in a friction stir welded seam

Abstract

The possibilities of the radioscopic detection of defects such as remnant joint lines, which occur during friction stir welding, have been evaluated. In addition to common radioscopy, a microfocus source of X-ray radiation and metallography were applied to attain high geometric magnification. It was shown that this defect type can be detected using high geometric magnification; defects such as foreign inclusions may occur as a result of tool wear.