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Research Article

Weldability of interlocked-end friction stir welding of aluminum alloy: single and double-sided welding

Olatunji Oladimeji Ojo1,3, Gbadebo Samuel John2,3

1Department of Industrial and Production Engineering, Federal University of Technology Akure, Nigeria       

2Department of Mechanical Engineering, Ogun State Institute of Technology Igbesa, Nigeria

3Department of Mechanical Engineering, Federal University of Technology Akure, Nigeria




Interlocked end friction stir welding; 

Aluminum alloy;

Weld structure;

Tensile strength;


The weldability of the interlocked-end friction stir welding (IFSW) of aluminum plates was studied via the use of single and double-sided welding procedures. The abutting ends of the Al plates were milled into equidistant slots (with 5 mm rise and 10 mm span) and an interlocked/meshed end profile was formed when two slotted plates were brought together. The friction stir welding of the interlocked end of the plates was carried out at different tool rotational (700 – 1120 rpm) and traverse (21 – 63 mm/min) speeds while the structure, tensile strength, and fracture behaviors of the resultant welds were examined. The results showed the presence of flow-induced defects in the welds irrespective of the adopted welding procedure. Relative to the single-sided welds, the severity of the weld defect was significantly reduced in the double-sided welds due to dual material plasticization, material consolidation, and twofold recrystallization advantages. Improved tensile strength (from 39.6 to 69.1 MPa), reduced area fraction of flow-induced defect, and a large area with ductile features are obtained in the double-sided IFSW weld. A double-sided welding procedure is recommended for the interlocked-end friction stir welding process.

© 2022 MIM Research Group. All rights reserved.


8/12/2023 Special Issue: Embark on a journey of innovation with the journal of Research on Engineering Structures and Materials as we unveil a compelling opportunity for contributors in our upcoming special issue, "Design, Analysis, and Manufacturing of Composite Vehicle Structures." Led by distinguished Guest Editors Liubov Gavva and Oleg Mitrofanov from Moscow Aviation Institute. For more info see the link.

21/10/2023 Journal Submission System Upgrade Completed: We're delighted to announce that our Journal Submission and Tracking System has undergone a significant upgrade, aimed at enhancing your experience. We apologize for the delay, and any inconvenience it may have caused. Here are the key enhancements from a user perspective:

Improvements are designed to make your interaction with our journal smoother and more efficient. Please take the upgraded system for a spin and share your thoughts with us. If you encounter any issues or have questions, please don't hesitate to reach out to our support team.

27/12/2022 Reviewer AwardsThe winners of 2022 reviewer awards of Research on Engineering Structures and Materials (RESM) are announced. More information can be found at Reviewer Awards section. 

(More details of the news may be given in the News section)

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2022 Reviewer Awards:

Please, visit Reviewer Awards section for the winners of the 2022 RESM reviewer awards.

2022 Best Paper Award:

The paper authored by Nitin Kumar, Michele Barbato, Erika L. Rengifo-López and Fabio Matta entitled as “Capabilities and limitations of existing finite element simplified micro-modeling techniques for unreinforced masonry” is awarded the 

2022 Most Cited Paper Award:

The paper authored by Aykut Elmas, Güliz Akyüz, Ayhan Bergal, Müberra Andaç and Ömer Andaç entitled as “Mathematical modelling of drug release" is awarded the


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