What is it about?
Effect of process variables e.g. rotation rate, traverse speed, plunge depth, tilt angle and pin height on faying surface and lap shear strength of lap joints defects was studied. This work shows how process variables affect the vertical location of faying surface in the lap joint. This is shown both by optical images and quantitative measurement of the effective load carrying thickness.
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Why is it important?
Lap shear strength of a lap joint is significantly affected by vertical location of the faying surface in the weld cross section. This study brings out the effect of each of the process parameters on effective thickness and hence joint strength.
Perspectives
Apart from the direct observation of the effect of these parameters on faying surface this work also shows light on the material flow aspect of the FSW process. Faying surface, always present in an FSW, can also be considered as a marker plane. Effect of tool pin height on the vertical displacement of this horizontal plane is clearly evident in the paper.
Dr. Manasij Kumar Yadava
Indian Institute of Technology Kanpur
Read the Original
This page is a summary of: Study of friction stir joining of thin aluminium sheets in lap joint configuration, Science and Technology of Welding & Joining, January 2010, Taylor & Francis,
DOI: 10.1179/136217109x12537145658733.
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