%0 journal article
%@ 0268-3768
%A Huang, Y., Wang, Y., Wan, L., Liu, H., Shen, J., dos Santos, J.F., Zhou, L., Feng, J.

%D 2016
%J The International Journal of  Advanced Manufacturing Technology
%N 1
%P 1115-1123 
%R doi:10.1007/s00170-016-8603-7
%T Material-flow behavior during friction-stir welding of 6082-T6 aluminum alloy
%U https://doi.org/10.1007/s00170-016-8603-7
1 
%X Material-flow behavior during friction-stir welding of 6082-T6 aluminum alloy has been visualized by marker insert technique. Four stacked layers were evolved in welding nugget zone (WNZ) in the transverse section. The material-flow behavior in vertical direction was detected by observing the distribution of Cu foil fragments and Al-Cu intermetallic compounds. The downward and upward flows encounter each other at the advancing side in the material depositing process, changing the morphology of WNZ. A conceptual balanced-flow model and a plastic material-flow model were used to describe the material-flow behavior, and the origin of the downward material flow in the advancing side was discussed. The excess-material flow derived by the welding tool due to the existence of the tilt angle is crucial to the weld formation.