Lehrstuhl für Fertigungstechnologie, Universität Erlangen-Nürnberg

Processtechnical investigations in friction stir welding of metallic materials



Datum: 16.07.2008


Author


Reporter

  • Prof. Dr.-Ing. Dr.-Ing. E.h. mult. Dr. h.c. mult. M. Geiger
  • Prof. Dr.-Ing. F. W. Bach (Leibniz Universität Hannover)

Friction stir welding, which is characterized as a solid phase welding technique, as none of the welding partners is molten, hot cracks, defects or pores are completely avoided. This enables applications and products in a very high quality and at the same time of economic interest, especially as cost intensive post refinishing is reduced. With regard to economy as well as science the methodical procedure permits the successful realization of friction stirred similar and dissimilar joints in sheet thicknesses of about 1 mm. As the state of the art uses for technical applications until now mainly sheet thicknesses of more than 3 mm for aluminium and more than 6 mm for steel, these results enlarge the potential of friction stirred parts significantly, e.g. for automotive industry. Additionally new solutions for implementing temperature depending viscosities generated by flow curves at elevated temperatures and cases for friction and adhesion are developed for computational fluid dynamic simulation.