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Effects of the tool rotational speed and shoulder penetration depth on mechanical properties and failure modes of friction stir spot welds of aluminum 2024-T3 sheets

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Abstract

In this work, friction stir spot welding with 1.6 mm thickness of the 2024-T3 aluminum alloy is carried out. The effects of the tool rotational speed and shoulder penetration depth on surface appearance, macrostructure, temperature profile, maximum failure load and failure modes are investigated. Results show that, the effect of the tool rotational speed on maximum tensile shear load is similar to the effect of the shoulder penetration depth, increasing tool rotational speed and shoulder penetration depth resulted in the increase of the tensile shear load. Maximum load of about 8282 N is obtained by using 1000 rpm rotational speed and 0.7 mm shoulder penetration depth. Observation of the failed specimens indicates two types of failure modes under tensile shear loading, the shear fracture that occurs in low shoulder penetration depths and tensile shear fracture that occurs in high shoulder penetration depths.

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Authors and Affiliations

  1. Department of Materials Engineering, South Tehran Branch, Islamic Azad University, Tehran, Iran

    Moslem Paidar

  2. Department of Materials Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran

    Alireza Khodabandeh & Hamidreza Najafi

  3. Department of Materials Engineering, Tarbiat Modares University, Tehran, Iran

    Alireza Sabour Rouh-aghdam

Authors
  1. Moslem Paidar
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  2. Alireza Khodabandeh
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  3. Hamidreza Najafi
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  4. Alireza Sabour Rouh-aghdam
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Correspondence to Moslem Paidar.

Additional information

Recommended by Associate Editor Chongdu Cho

Moslem Paidar received his B.S. in Materials Engineering from Shahrekord University, Iran, in 2010. Then, He received his M.S. degrees from Graduate School of Matrials Engineering, Tehran Science and Research Branch, Islamic Azad University, Tehran, Iran in 2013. Mr. Paidar is currently Ph.D student in South Tehran Branch, Islamic Azad University in Tehran, Iran. Mr. Paidar’s research interests include Laser Beam Welding, Difusion Welding, Welding-Brazing, Surface engineering, Brazing And Activated TIG for disimilar materilas and Light metals.

Alireza Khodabandeh is an assistant professor of Materials Engineering Department at Science and Research Branch of Islamic Azad University in Tehran, Iran, where he has been a faculty member since 2008. He received his B.S. degree in Materials Engineering from Shiraz University, Iran, at 1994. He also received his M.Sc. in Materials Engineering from Tarbiat Modares University, Iran, at 1997 and then he completed his Ph.D. at 2005, from Tarbiat Modares University. His research interests lie in the area of Physical Properties of Materials with a focus on Solid State Transformation, Diffusion in Solids and Microstructure.

Hamidreza Najafi received his B.S. degree in Materials Engineering from University of Tehran, Iran, in 1999. Then, He received his M.S. degree from Sharif University of Technology, Iran, 2001. He graduated in 2007 with a Ph.D. in Materials Engineering from University of Tehran, Iran. Dr. Najafi is currently an Assistant Professor at Department of Materials Engineering at Tehran Science and Research Branch, Islamic Azad University, Tehran, Iran. His research interests include phase transformations and materials characterization.

Alireza Sabour rouh-Aghdam an associate professor of Materials Engineering Department at Tarbiat Modares University in Iran, Tehran. He received his M.S. degree from Germany, 1988. He graduated in 1993 with a Ph.D. in Materials Engineering from in German. Dr. Sabour rouh-Aghdam is faculty member of Department at Tarbiat Modares University since 1995. His research interests include Surface engineering and materials characterization.

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Paidar, M., Khodabandeh, A., Najafi, H. et al. Effects of the tool rotational speed and shoulder penetration depth on mechanical properties and failure modes of friction stir spot welds of aluminum 2024-T3 sheets. J Mech Sci Technol 28, 4893–4898 (2014). https://doi.org/10.1007/s12206-014-1108-0

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  • DOI: https://doi.org/10.1007/s12206-014-1108-0

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