Effect of tool pin profile on microstructure and mechanical properties of friction stir welded AZ31B magnesium alloy

Motalleb-nejad, Pouyan; Saeid, T.; Heidarzadeh, Akbar; Darzi, Kh.; Ashjari, M.

doi:10.1016/j.matdes.2014.02.068

Cited by 113 publications

(45 citation statements)

References 27 publications

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“…Friction Stir Welding (FSW) is a solid-state joining process with many advantages including producing high strength joints with low distortion [1] and the ability to join high strength aluminium alloys and produce dissimilar joints that are difficult to join by fusion techniques. The FSW technique has many applications in the aeronautical, automotive and shipping industries [2,3] and is considered to be energy efficient and environmentally friendly [4].…”

Section: Introductionmentioning

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: Introductionmentioning

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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“…It has been utilized to weld and process different aluminum (Heidarzadeh et al 2015), Mg (Asadi et al 2012;2010b;Motalleb-nejad et al 2014;Faraji and Asadi 2011), and Cu (Farrokhi et al 2013) alloys, some of which are classified as practically unweldable alloys in use of conventional welding methods.…”

Section: Introductionmentioning

confidence: 99%

Microstructural simulation of friction stir welding using a cellular automaton method: a microstructure prediction of AZ91 magnesium alloy

Asadi

Givi

Akbari

2015

Int J Mech Mater Eng

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Background: Recently, some researchers have simulated FSW using FEM and studied the influence of process parameters and tool geometry on material flow, welding force, and temperature and strain distributions during friction stir processing. Additionally, in terms of microstructure modeling, various approaches such as the Cellular Automaton (CA) model have been developed to simulate microstructural evolution during plastic deformation processes. Method: In this work, a finite element model (FEM) is established to study the microstructure evolution during friction stir welding (FSW) of AZ91 magnesium alloy. To this aim, first, the hot compression tests at different temperatures and strain rates were carried out to achieve the flow stress curves. Then, the hardening parameter, the recovery parameter and the strain rate sensitivity were calculated according to flow stress results and using the Kocks−Mecking model. Next, a continuum based thermo-mechanically coupled rigid-viscoplastic FEM model was proposed in Deform-3D software to simulate the FSW of AZ91 magnesium alloy. To evaluate microstructure of the weld zone a model is proposed based on the combination of Cellular Automaton and Laasraoui-Jonas models.

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“…Also, there are no toxic fumes or smoke produced during or after the welding process. The process is energy efficient and environmentally friendly [10]. Normally metals and alloys are joined by fusion welding process; particularly welded joints of materials having low weldability may be found with welding defects.…”

Section: Figure 1: Schematic Diagram Of Fswmentioning

confidence: 99%

An Investigation on Mechanical Behaviour of Nylon 6 - Polycarbonate Hybrid Composite

Darwins¹,

Tjprc²

2018

IJMPERD

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Effect of tool pin profile on microstructure and mechanical properties of friction stir welded AZ31B magnesium alloy

Cited by 113 publications

References 27 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

Microstructural simulation of friction stir welding using a cellular automaton method: a microstructure prediction of AZ91 magnesium alloy

An Investigation on Mechanical Behaviour of Nylon 6 - Polycarbonate Hybrid Composite

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