Influence of tool pin profiles on waviness and natural frequency during friction stir welding of Al-Li alloys plates

IF 2 3区材料科学 Q2 ENGINEERING, MECHANICAL

Surface Topography: Metrology and Properties Pub Date : 2023-05-16 DOI:10.1088/2051-672X/acd5ea

Sanjeev Kumar, Ashish Soni, J. Katiyar, Sachin Kumar, B. S. Roy

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Abstract

The third generation of Al-Li 2050-T84 alloy was primarily used in aerospace industries due to its exceptional potential for weight saving, high strength, and increased fatigue crack growth resistance. In the present research, three different types of tool pin profiles, namely, hybrid, taper threaded, and triangular, were used to join 2050-T84 Al-Li alloy by using Friction Stir Welding (FSW) at a constant rotational speed of 23.33 rotation/second with a traverse speed of 0.003 meters per second and tilt angle of 2°. The research explored the effect of different tools on weld bead structure, waviness and natural frequency of welded plates. The experimental results show that the hybrid tool pin side generates 10.9% higher heat than the threaded taper tool and 25.8% higher than the triangular tool. Moreover, the hybrid tool produces 50.1% lower waviness of welded specimens than the threaded taper tool and 55.7% lower than the triangular tool at the nugget zone (NZ). The research established that a hybrid tool pin profile is advantageous as it generates a higher frequency and lower acceleration under the applied load in friction stir welded specimens.

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刀销轮廓对铝锂合金板搅拌摩擦焊波形和固有频率的影响

第三代Al-Li 2050-T84合金主要用于航空航天工业，因为它具有减重、高强度和抗疲劳裂纹增长的特殊潜力。在恒转速为23.33转/秒、横移速度为0.003米/秒、倾斜角度为2°的搅拌摩擦焊接(FSW)条件下，采用混合、锥螺纹和三角形三种不同类型的工具销型连接2050-T84铝锂合金。研究了不同工具对焊接板焊缝结构、波纹度和固有频率的影响。实验结果表明，混合刀销侧产生的热量比螺纹锥刀高10.9%，比三角刀高25.8%。混合刀具在熔核区(NZ)的波纹度比螺纹锥刀具低50.1%，比三角形刀具低55.7%。研究表明，混合刀销型在搅拌摩擦焊试样载荷作用下具有较高的频率和较低的加速度等优点。

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来源期刊

Surface Topography: Metrology and Properties Materials Science-Materials Chemistry

CiteScore

4.10

自引率

22.20%

发文量

183

期刊介绍： An international forum for academics, industrialists and engineers to publish the latest research in surface topography measurement and characterisation, instrumentation development and the properties of surfaces.