@article{oai:air.repo.nii.ac.jp:00000862,
 author = {Chen, Z.W. and Peris, R. and Maginness, R. and Xu, Z.},
 issue = {1/2},
 journal = {International Journal of the Society of Materials Engineering for Resources},
 month = {Nov},
 note = {Friction stirwelding (FSW) experiments were conducted using three different aluminium alloys (a work hardened alloy, an age hardened alloy and a cast alloy) followed by metallographic examination focusing on the upper weld zone and the surface layer. The examination has revealed the features of the major forward flow resulting from the forward motion of the tool shoulder. A thin shear layer due to tool rotation was identified between the tool shoulder and the workpiece with a distinctive shear flow direction. The thickness of the shear layer was alloy dependent. An embedded layer in the upper weld zone has also been identified. The flow phenomena leading to this will be discussed. A velocity profile in the shear layer, based on the apparent alignment of Si particles in the cast alloy after welding, has suggested a dominant sliding contact condition.},
 pages = {77--81},
 title = {Material Flow and the Shear Layer in the Upper Weld Zone during Friction Stir Welding of Aluminium Alloys},
 volume = {14},
 year = {2006}
}