Influence of friction stir welding process and tool parameters on strength properties of AA7075-T6 aluminium alloy joints

Rajakumar, S.; Muralidharan, C.; Balasubramanian, V.

doi:10.1016/j.matdes.2010.08.025

Cited by 300 publications

(138 citation statements)

References 23 publications

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“…The reduction in heat is because of the following; one decrease the coefficient of friction due to local melting of metal around the pin and the other is absorbed by the latent heat of melting of the metal [23]. But in the widths of thermomechanical zone and heat affected zone of these joints are increased as well as hardness reduced due to over ageing temperature and slow cool [26].…”

Section: Discussionmentioning

confidence: 99%

Effect of Preheating on Microstructure and Tensile Properties of Friction Stir Welded AA7075 Aluminium Alloy Joints

Poongkundran¹,

Senthilkumar²

2016

Braz. arch. biol. technol.

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Section: Discussionmentioning

confidence: 99%

Effect of Preheating on Microstructure and Tensile Properties of Friction Stir Welded AA7075 Aluminium Alloy Joints

Poongkundran¹,

Senthilkumar²

2016

Braz. arch. biol. technol.

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“…According to Mishra and Mahoney 21 and Kim et al 35 , this could be attributed to insufficient heat input (0.89 kJ/mm). Rajakumar et al 36 showed that the presence of wormholes on the advancing side of the welded joint can be caused by a lack of flow due to low heat input during the process. The lower axial force, combined with higher spindle speed and lower transverse speed, resulted in lower torque on the welded joint, in agreement with lower heat input ( Table 2).…”

Section: Joining Process and Obtaining Consolidated Full Penetration mentioning

confidence: 99%

Friction stir welding of duplex and superduplex stainless steels and some aspects of microstructural characterization and mechanical performance

et al. 2016

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Friction stir welding was used to produce butt joints on 6 mm thick plates of UNS S32101 lean duplex stainless steel, S32205 duplex stainless steel, and S32750 and S32760 superduplex stainless steels. Fully consolidated joints were achieved, with full penetration, using heat input of 1.37-1.50 kJ/mm. Specimens submitted to tensile testing performed perpendicular to the welding direction showed failure on the base metal, reflecting better mechanical performance of the welded joints. Furthermore, tensile testing along the joints revealed higher yield and tensile strengths in all cases, as well as increased elongation. Microstructural evaluation showed that there was pronounced grain refinement in the welded joints of all the materials studied, achieving grain sizes as small as 1 µm. The differences in the ferrite and austenite grain sizes in the stir zone, such as the degree of grain refinement, could be explained by the combination of dynamic recrystallization of austenite during the welding process and the recrystallization and growth of the ferrite grains, promoted firstly by the severe deformation and secondly by the high temperature inherent to the FSW process. Superduplex stainless steel FSW joints were more able to maintain a balanced microstructure, compared to conventional and lean duplex stainless steels, due to greater homogeneity of recrystallization in the welded joint.

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“…The frictional heat generation between the surface of the plate and rotating tool (tool shoulder and tool pin) depends on coefficient of friction that produces the heat input and temperature distribution in the weld [11]. The insufficient axial force causes the defect formation in the welded joint due to not enough interaction between tool shoulder and base metal [12].…”

Section: Axial Forcementioning

confidence: 99%

Emerging Modeling and Simulation Techniques for Friction Stir Welding - A Review

2015

International Conference on Advancements and Recent Innovations in Mechanical, Production and Industrial Engineering

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Abstract-Friction stir welding is a relatively new solid-state joining technique which is widely acceptable in various industries (aerospace, automotive, railway, and shipbuilding) to join similar and dissimilar metallic alloys that are difficult to weld by conventional fusion welding process. In last decade, the friction stir welding processes developments have been active areas research due to dimensional stability of the welded structure, low residual stresses and most important eco-friendly wielding process. The welding mechanism is based on the frictional heat generation process through the interaction of a non-consumable tool to adjoining edges of the plates to be joined. There are a number of issues that affect the performance of friction stir welding such as heat generation, material flow, tool geometry, tool rotation, travel speed, axial force, and tilt angle. Several modeling and simulation techniques have been applied for the characterization of friction stir wielding process phenomenon that are empirical, analytical, numerical and artificial intelligence modeling techniques. The objective of this paper is to review the recent works on modeling and simulation techniques and to emphasize the future requirements for increased understanding of the modeling and simulation efforts in the field of friction stir welding.

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Influence of friction stir welding process and tool parameters on strength properties of AA7075-T6 aluminium alloy joints

Cited by 300 publications

References 23 publications

Effect of Preheating on Microstructure and Tensile Properties of Friction Stir Welded AA7075 Aluminium Alloy Joints

Effect of Preheating on Microstructure and Tensile Properties of Friction Stir Welded AA7075 Aluminium Alloy Joints

Friction stir welding of duplex and superduplex stainless steels and some aspects of microstructural characterization and mechanical performance

Emerging Modeling and Simulation Techniques for Friction Stir Welding - A Review

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