FRICTION STIR WELDING COMBINED WITH SUPERPLASTIC FORMING FOR MONOLITHIC TITANIUM AIRCRAFT STRUCTURE: INFLUENCE OF POST WELDING THERMAL TREATMENTS ON WELD NUGGET RESIDUAL STRESS

摘要

This paper includes a review of the manufacturing technologies related to the combination of friction stir welding (FSW) and superplastic forming (SPF) to fabricate large monolithic titanium structures for aircraft. The particular focus is on the post FSW residual stress measured on the weld nugget after thermal treatments and SPF forming.