Numerical investigation on the mechanical, thermal, metallurgical and material flow characteristics in friction stir welding of copper sheets with experimental verification

Pashazadeh, Hamed; Teimournezhad, Jamal; Masoumi, Abolfazl

doi:10.1016/j.matdes.2013.09.028

Cited by 72 publications

(36 citation statements)

References 31 publications

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“…Strain rate is considered one of the important factors in FSW as it can be used to determine the effect of the stirring action; it can also give an indication of the size of the deformation region due to the tool rotation during the process [40]. In this study, L 1 and L r , which are shown in Figure 7, were used to examine what happens underneath the pin in the weld root zone.…”

Section: Predictions Of the Strain Rate Distributionmentioning

confidence: 99%

A numerical comparison of the flow behaviour in Friction Stir Welding (FSW) using unworn and worn tool geometries

2015

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The tool is a key component in the friction stir welding (FSW) process, but the tool degrades and changes shape during use, however, only a limited number of experimental studies have been undertaken in order to understand the effect that worn tool geometry has on the material flow and resultant weld quality. In this study, a validated model of the FSW process is generated using the CFD software FLUENT, with this model then being used to assess the detail of the differences in the flow behaviour, mechanically affected zone (MAZ) size and strain rate distribution around the tool for both unworn and worn tool geometries. Comparisons are made at two different tool rotational speeds using a single weld traverse speed. The study shows that there are significant differences in the flow behaviour around and under the tool when the tool is worn. This modelling approach can therefore be used to improve understanding of the effective limits of tool life for welding, with a specific outcome of being able to predict and interpret the behaviour when using specific weld parameters and component geometry without the need for experimental trials.

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Section: Predictions Of the Strain Rate Distributionmentioning

confidence: 99%

A numerical comparison of the flow behaviour in Friction Stir Welding (FSW) using unworn and worn tool geometries

2015

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“…Cavaliere (2005) evaluated the mechanical properties of 2618 aluminum alloy friction stir processed with 20% of alumina. Pashazadeh, Masoumi, and Teimournezhad (2013) developed a 3D numerical model for friction stir welding (FSW) of copper sheets using the Deform 3D software. In this work, the temperature, effective plastic strain, and material flow behavior of copper were studied during the FSW process.…”

Section: Public Interest Statementmentioning

confidence: 99%

RETRACTED ARTICLE: Finite element simulation of material flow in friction stir process of nylon 6 and nylon 6/MWCNTs composite

Zinati

2015

Cogent Engineering

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In the current study, a numerical model based on Lagrangian incremental formulation was developed for friction stir process (FSP) of nylon 6 and nylon 6/ multiwalled carbon nanotube (MWCNT) composite to investigate the thermomechanical behavior of them (e.g. temperature, effective plastic strain distribution, material flow, and material velocity). For this purpose, FSP was used to disperse the MWCNTs among the polymer matrix of nylon 6, homogenously. The X-ray diffraction and scanning electron microscopy were used to investigate the properties of fabricated nanocomposite. The obtained results were then used to verify the objectives of numerical model. According to the results, the MWCNTs are separated from each other while passing the tool-pin due to high plastic strain applied on them and greater amount of the material accumulates in the AS of stirred zone after passing the tool-pin. Also, MWCNTs were homogeneously and straightly dispersed throughout the nylon 6. The straight and non-curved dispersion of MWCNTs results in growth of its reinforcement capability.

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“…This is because thorough understanding of the flow will help to predict the performance of friction stir welds in service. Researchers have employed different techniques and models in attempting to establish the flow patterns, as well as material positioning in dissimilar friction stir welds with consideration of different welding parameters [1][2][3][4][5][6][7][8][9][10][11][12][13]. However, all of these are far from being fully understood and established.…”

Section: Introductionmentioning

confidence: 99%

Flow patterns in friction stir welds of AA5083 and AA6082 alloys

et al. 2015

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Numerical investigation on the mechanical, thermal, metallurgical and material flow characteristics in friction stir welding of copper sheets with experimental verification

Cited by 72 publications

References 31 publications

A numerical comparison of the flow behaviour in Friction Stir Welding (FSW) using unworn and worn tool geometries

A numerical comparison of the flow behaviour in Friction Stir Welding (FSW) using unworn and worn tool geometries

RETRACTED ARTICLE: Finite element simulation of material flow in friction stir process of nylon 6 and nylon 6/MWCNTs composite

Flow patterns in friction stir welds of AA5083 and AA6082 alloys

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