Paper Title:
Enhanced Numerical Results on Friction Stir Welded Aluminium Butt Joints
  Abstract

Friction stir welding is a newer technology to join materials in the solid phase. Therefore plenty of problems which appear by melting phase welding technologies for aluminium alloys are avoided by this process. This is the main chance for friction stir welding to be accepted and integrated in forthcoming applications, especially for uses out of aluminium alloys. Starting from former results for friction stir welding of aluminium this article deals with the determination of the constitutive material properties of friction stir welded aluminium tailored blanks with regard to the finite-element (FE) simulation of sheet metal forming. The FE simulation of the formability of welded sheet metal demands the knowledge of the precise mechanical properties of the base material as well as the characteristic zones of the weld seam, which are affected by friction stir welding. While ordinary tensile tests can only determine the constitutive behaviour of a simple tensile specimen, an optical strain measurement can be used to determine flow stresses of the base and of the welded material with an adapted tensile specimen, respectively. By the usage of the so called rule of mixture the advantages of this new approach is demonstrated with a comparison of the tensile forces within FE simulations and experimental validations. For this purpose specimen with the weld seam oriented perpendicular and parallel to the uniaxial loading direction are utilized.

  Info
Periodical
Main Theme
Edited by
F. Micari, M. Geiger, J. Duflou, B. Shirvani, R. Clarke, R. Di Lorenzo and L. Fratini
Pages
759-766
DOI
10.4028/www.scientific.net/KEM.344.759
Citation
D. Staud, A. Giera, M. Merklein, M. Geiger, "Enhanced Numerical Results on Friction Stir Welded Aluminium Butt Joints", Key Engineering Materials, Vol. 344, pp. 759-766, 2007
Online since
July 2007
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Price
$35.00
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