Flow patterns during friction stir welding

Guerra, M.; Schmidt, C.; McClure, Joshua P.; Murr, L. E.; Nunes, A. C.

doi:10.1016/s1044-5803(02)00362-5

Cited by 492 publications

(281 citation statements)

References 7 publications

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“…Therefore, it can be said that it represents approximately the boundary between the ThermoMechanically Affected Zone (TMAZ) and the Stir Zone (SZ) subjected to plasticization and agitation. This is in accordance with that reported by Guerra et al [25]. In this way, it will be possible to predict different microstrucutral regions (TMAZ, SZ) whose in turn determines the final properties of the welded joint.…”

Section: Velocity Fields and Materials Flowsupporting

confidence: 91%

“…As a consequence, the material stays close to the surface of the tool pin remaining inside to the SZ (velocity module>20mm/ seg) during several revolutions. This type of flow patterns was observed by Guerra et al [25]. There, was recognized a "rotational zone" equivalent to SZ, where the material "is moved by entering onto the rotational zone, undergoing several revolutions, and finally dropping off in the wake of the nib".…”

Section: Velocity Fields and Materials Flowmentioning

confidence: 57%

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3D modeling of material flow and temperature in Friction Stir Welding

et al. 2009

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Section: Velocity Fields and Materials Flowsupporting

confidence: 91%

Section: Velocity Fields and Materials Flowmentioning

confidence: 57%

3D modeling of material flow and temperature in Friction Stir Welding

et al. 2009

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“…Accordingly, the material remains near the surface of the tool shoulder. This kind of flow patterns was observed by Guerra et al [8]. It has been demonstrated the creation of a rotational area around the shoulder, where the material undergoes several turns before deposited in the pin wake.…”

Section: Resultssupporting

confidence: 62%

Numerical Simulation of Temperature Distribution and Material Flow During Friction Stir Welding 2017A Aluminum Alloys

et al. 2016

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Abstract.This study describes the use of fluid dynamic code, FLUENT to model the flow of metal in the AA2017A case around the welding tool pin (FSW). A standard threaded tool profile is used for the analysis of phenomena during welding such as heat generation and flow of the material are included. The main objective is to gain a better understanding of the flow of material around a tool. The model showed a large number of phenomena similar to those of the real process. The model has also generated a sufficient amount of heat, which leads to a good estimate of the junction temperature. These results were obtained using a viscosity which is near the solidus softening.

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“…As can be seen in Figure 2, the workpiece is separated into different welding zones [68][69][70][71][72]. Parent material, Heat Affected Zone (HAZ) in which, a nonlinear temperature heat conductivity is available, Thermo-Mechanically Affected Zone (TMAZ) in which, extremely large plastic deformation, nonlinear heat conductivity and asymmetric temperature profile are present.…”

Section: Different Welding Zones and Different Modelling Scalesmentioning

confidence: 99%

A Comparison of Different Finite Element Methods in the Thermal Analysis of Friction Stir Welding (FSW)

Meyghani

Awang

Emamian

et al. 2017

Metals

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Friction Stir Welding (FSW) is a novel kind of welding for joining metals that are impossible or difficult to weld by conventional methods. Three-dimensional nature of FSW makes the experimental investigation more complex. Moreover, experimental observations are often costly and time consuming, and usually there is an inaccuracy in measuring the data during experimental tests. Thus, Finite Element Methods (FEMs) has been employed to overcome the complexity, to increase the accuracy and also to reduce costs. It should be noted that, due to the presence of large deformations of the material during FSW, strong distortions of mesh might be happened in the numerical simulation. Therefore, one of the most significant considerations during the process simulation is the selection of the best numerical approach. It must be mentioned that; the numerical approach selection determines the relationship between the finite grid (mesh) and deforming continuum of computing zones. Also, numerical approach determines the ability of the model to overcome large distortions of mesh and provides an accurate resolution of boundaries and interfaces. There are different descriptions for the algorithms of continuum mechanics include Lagrangian and Eulerian. Moreover, by combining the above-mentioned methods, an Arbitrary Lagrangian-Eulerian (ALE) approach is proposed. In this paper, a comparison between different numerical approaches for thermal analysis of FSW at both local and global scales is reviewed and the applications of each method in the FSW process is discussed in detail. Observations showed that, Lagrangian method is usually used for modelling thermal behavior in the whole structure area, while Eulerian approach is seldom employed for modelling of the thermal behavior, and it is usually employed for modelling the material flow. Additionally, for modelling of the heat affected zone, ALE approach is found to be as an appropriate approach. Finally, several significant challenges and subjects remain to be addressed about FSW thermal analysis and opportunities for the future work are proposed.

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Flow patterns during friction stir welding

Cited by 492 publications

References 7 publications

3D modeling of material flow and temperature in Friction Stir Welding

3D modeling of material flow and temperature in Friction Stir Welding

Numerical Simulation of Temperature Distribution and Material Flow During Friction Stir Welding 2017A Aluminum Alloys

A Comparison of Different Finite Element Methods in the Thermal Analysis of Friction Stir Welding (FSW)

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