Investigating the Effect of SiC Nanoparticles on the Shear Strength of Friction Stir Lap Welded 7075 Aluminum Alloy

Document Type : Research Article

Authors

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

2 دانشگاه صنعتی امیرکبیر

Abstract

In this paper, the effect of including Silicon Carbide nanoparticles in the weld zone on the maximum shear strength of friction stir lap welded 7075 aluminum alloy is investigated, both experimentally and numerically. This objective is carried out by studying the effects of rotational and transverse speeds, tilt angle, the shape of the tool, and the penetration depth. The numerical investigation is based on developing an FE model by means of Deform and ABAQUS to simulate the welding procedure, which results are verified by the experimental findings. The experimental procedure is designed based on the Taguchi method. The verification of the developed FE model shows that the simulation results are in proper agreement with the experimental findings. In general, including Silicon Carbide nanoparticles in the weld zone can increase the maximum shear strength up to 24%, compared to the case where the specimens are welded without Silicon Carbide. Furthermore, applying the threaded tapered tool leads to higher shear strength in comparison with the squared shape tool, i.e., the strength of the specimens welded by the threaded tapered tool is 4 to 5% higher without Silicon Carbide inclusion and 4 to 7.5% higher with Silicon Carbide, compared to the same case welded by the squared tool. In addition, while the rotational speed has the highest influence on the findings, the tilt angle does not affect the results that much.

Keywords

Main Subjects

References

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Amirkabir Journal of Mechanical Engineering
Volume 56, Issue 1
2024
Pages 31-56

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