Investigating the Shear Strength of Friction Stir Lap Welded 7075 Aluminum Alloy

Document Type : Research Article

Authors

1 Department of Mechanical Engineering, Amirkabir University of Technology, Tehran, Iran

2 New Technologies Research Center, Amirkabir University of Technology, Tehran, Iran

Abstract

Creating melt joints in aluminum is an obstacle in introducing this metal into structures.
This is due to the fact that fusion welding methods of aluminum leaves mechanical and metallurgical
defects in the final produced parts. Friction stir welding is a non-melting replacement fabrication method,
which creates welded joints from a semi-solid material state. In this paper, friction stir lap welding of
7075 aluminum alloy is studied both numerically and experimentally with the aim of investigating the
shear strength of the welded joint. The shear strength which is calculated by the simulation is maximum
14 to 15 % lower to the acquired experimental results, which shows that the simulation process can
appropriately be utilized to predict the shear strength of the welded joints for different cases. In addition,
the results show that the maximum shear strength is equal to 165 Mpa which is obtained for a case in
which the rotational speed is 1250 rpm, the linear speed is 50 mm/min and the tilt angle is set to 3˚.

Keywords

Main Subjects

References

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Amirkabir Journal of Mechanical Engineering
Volume 49, Issue 4
March 2018
Pages 863-874

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