Depriving friction stir weld defects in dissimilar aluminum lap joints

Author:

Suresh S1ORCID,Natarajan Elango23ORCID,Mohan Dhanesh G45,Ang Chun Kit2,Sudhagar S6

Affiliation:

1. Department of Mechanical Engineering, Erode Sengunthar Engineering College, Erode, India

2. Faculty of Engineering, Technology and Built Environment, UCSI University, Kuala Lumpur, Malaysia

3. Department of Mechanical Engineering, PSG Institute of Technology and Applied Research, Coimbatore, India

4. School of Engineering, Faculty of Technology, University of Sunderland, Sunderland, UK

5. Centre of Research Impact and Outcome, Chitkara University Institute of Engineering and Technology, Chitkara University, Punjab, India

6. Department of Mechanical Engineering, Kalaignarkarunanidhi Institute of Technology, Coimbatore, India

Abstract

The contemporary automotive industry increasingly incorporates composite materials and innovative joining techniques to meet customer demands for lightweight, high-strength alloys. This research explores the feasibility of using friction stir welding (FSW) methods to fabricate dissimilar aluminum nanocomposite lap joints, integrating Al2O3 nanoparticles into the weld nugget. Lap joints were prepared with varying tool rotation speeds (1000–1600 rpm) and the mechanical and metallurgical behaviors of AA6061–AA7075-T6/Al2O3 lap joints were examined. The inclusion of filler material in the weld joint resulted in an 18% increase in shear strength compared to joints without filler. Dynamic crystallization impeded grain boundaries and reduced grain size in the weld stir zone (SZ), with the most enhanced mechanical characteristics observed at a tool rotation speed of 1400 rpm. The shear strength at 1400 rpm was 5780 N, representing a 17% increase compared to joints prepared at 1000 rpm. Field emission scanning electron microscopic examination revealed evenly dispersed Al2O3 nanoparticles within the weld zone, supporting the lap shear test results. Notably, joints created at lower (1000 rpm) and higher tool rotational speeds (1600 rpm) exhibited brittle fracture behavior. The addition of Al2O3 significantly improved lap joint tensile strength due to its uniform dispersion in the SZ. Increasing the FSW tool rotational speed from 1000 to 1400 rpm facilitated nanoparticle dispersion, further enhancing lap joint strength.

Publisher

SAGE Publications

Cited by 3 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Prospects of friction stir processed Mg alloys and composites-Reviews and suggestions;Journal of Materials Research and Technology;2024-07

2. Advanced Joining Methods for Lightweight Materials in Sustainable Manufacturing;Advances in Logistics, Operations, and Management Science;2024-05-03

3. Additive Manufacturing for a Sustainable Production;Advances in Logistics, Operations, and Management Science;2024-05-03

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