Influences of Rotational Speed on Friction Stir Welding Quality, Mechanical and Fatigue Behaviour of AA6061/SiC Composite
- Publisher:
- Springer Nature
- Publication Type:
- Journal Article
- Citation:
- Silicon, 2024, 16, (1), pp. 323-329
- Issue Date:
- 2024-01-01
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Influences of Rotational Speed on Friction Stir Welding Quality Mechanical and Fatigue Behaviour of AA6061 SiC Composite.pdf | Accepted version | 1.26 MB |
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The utilization of aluminium alloy composite materials is increased progressively in automotive, aerospace, and sports allocations due to their distinct physical and mechanical properties. The conventional metal joining process is not suitable for joining the composite material. The present work of silicon carbide (SiC) compacted aluminium alloy (AA6061) composite surface is joined by friction stir welding (FSW) process under the rotational speed of 800, 1200, and 1600 rpm. Influences of tool rotational speed on welding interface quality mechanical and fatigue properties of AA6061/SiC composite surface are evaluated. The internal defect area of the weld joint is detected by radiograph inspection, and its surface morphology is analyzed through the Scanning Electron Microscope (SEM) apparatus. It revealed that the coarse aggregated inter-metallic structure with an effective interface of weldment was observed. The 1200 rpm (rotational speed) performed AA6061 composite found enhanced yield and tensile strength of 23.7% and 25.66% improvement compared to the yield and tensile strength of weldment operated under 800 rpm rotational speed. The hardness of composite weldment is increased significantly with increased tool rotational speed. The maximum hardness of 88HV is by 1200 rpm performed weld joint. Sample 3 performed higher fatigue life (1.8 × 106 cycles) without failure.
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