Characterization of the Influence of Tool Pin Profile on Microstructural and Mechanical Properties of Friction Stir Welding

Marzbanrad, Javad; Akbari, Mostafa; Asadi, Parviz; Safaee, Samad

doi:10.1007/s11663-014-0089-9

Cited by 82 publications

(44 citation statements)

References 22 publications

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“…Shojaeefard et al (2013) studied the influence of pin profile and shoulder diameter on material flow, welding force, temperature, and strain distributions. Marzbanrad et al (2014) investigated the effect of tool pin profile, and Asadi et al (2011a;Tutunchilar et al 2012a) studied the effect of the process parameters on material flow, temperature, and strain distributions during friction stir processing.…”

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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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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“…Different bands involving different percentage of reinforcing particles were formed in the SZ. Moreover, as could be seen in these figures, the dispersion of reinforcing particles fabricated by square pin profile was improved in comparison with cylindrical pin profile due to higher eccentricity of the pin profile with flat surface and its pulsation effect, leading to an improvement in the material flow [31].…”

Section: Resultsmentioning

confidence: 66%

“…As shown in the figure, no vertical motion of material was observed, and the vertical position of material remains almost constant in the specimen fabricated with circular pin profile [37]. Moreover, the material flow generated by square pin profile was studied in our previous work [31]. No vertical motion of the material was observed when square pin profile was used.…”

Section: Resultsmentioning

confidence: 82%

“…6 The microstructures of the FSPed sample fabricated with a cylindrical pin profile, b square pin profile, and c threaded pin profile As a result, in the second pass, the powder agglomeration formed in the first pass is located in the second pass of RS when tool rotational direction is changed. The material located at RS is distributed over the center of the SZ and AS after passing the tool in the second pass [31].…”

Section: Resultsmentioning

confidence: 99%

“…The finer elements in the mean size of 0.5 mm were placed under the tool pin. More details on FEM model can be found in authors' pervious works [7,16,[30][31][32][33][34][35]. …”

Section: -mentioning

confidence: 99%

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The effect of reinforcement type on the microstructure, mechanical properties, and wear resistance of A356 matrix composites produced by FSP

Shojaeefard

Akbari

Asadi

et al. 2016

Int J Adv Manuf Technol

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Fabrication of particle-reinforced aluminum matrix composites has been pursued with a keen interest recently. However, a comparison of the effect of different reinforcements on the mechanical properties and wear resistance of A356 matrix composites fabricated by FSP is of great interest to be considered. In the present work, the microstructural, mechanical, and wear properties of A356 matrix composites reinforced by SiC, TiC, ZrO 2 , and B 4 C particles are investigated. Moreover, the effect of pin profile on distribution of reinforcing particles in the stir zone of the FSPed specimens is investigated. Hardness and wear tests are performed in order to investigate mechanical and wear properties of the composites. The composite reinforced by TiC particles exhibits higher hardness value compared with other reinforcements due to the excellent bonding between TiC and metal matrix as well as higher hardness value of reinforcement itself than other reinforcements. Moreover, wear test results show that the wear resistance of the composite is significantly improved compared with that of the base metal.

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Impact of tool profile on mechanical behavior and material flow in friction stir welding of dissimilar aluminum alloys

Abolusoro

Akinlabi

Kailas

2020

Materialwissenschaft Werkst

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The tool pin geometry used in friction stir welding of any material affects the transportation and mixing of the materials at the joint interface during the welding process. This further affects the mechanical properties of the joint. Tapered threaded and unthreaded tool pin profiles were investigated in this research work. The relationship between the material mixing characteristics and mechanical properties of each pin profile were evaluated. The results indicate that more materials mixing occurred in the nugget zone of the welds at lower rotational speed with the threaded tool pin than the unthreaded tool pin. However, at medium rotational speed, more volume of materials was swept into each other better in the unthreaded tool pin than the threaded pin. The tensile strengths of welds with the threaded tool pin were higher than the unthreaded tool pin. Although the two tool pins exhibit similarities in hardness variations across the weld zones however, higher average values of hardness were obtained at the nugget zone for welds performed with the tapered threaded tool pin. These could be as a result of better material mixing and higher opposition to grain dislocations across the dividing lines in the welds from the threaded tool pin.

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Characterization of the Influence of Tool Pin Profile on Microstructural and Mechanical Properties of Friction Stir Welding

Cited by 82 publications

References 22 publications

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

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

The effect of reinforcement type on the microstructure, mechanical properties, and wear resistance of A356 matrix composites produced by FSP

Impact of tool profile on mechanical behavior and material flow in friction stir welding of dissimilar aluminum alloys

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