Increasing of the Mechanical Properties of Friction Stir Welded Joints of 6061 Aluminum Alloy by Introducing Alumina Particles

Tashkandi, M. A.; Al-jarrah, J. A.; Ibrahim, Marwan A.

doi:10.1515/adms-2017-0009

Cited by 7 publications

(5 citation statements)

References 24 publications

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“…Based on the principles of the mechanical metallurgy, the strength of the texture is directly dependent on the characteristics of the grain-boundary network (morphology, density, and distribution) [55][56][57]. Furthermore, the grain size distribution and precipitation of secondary phase are also important microstructural features for controlling the mechanical properties during dynamic Recrystallisation [58][59][60].…”

Section: Ebsd General Texture Evaluationmentioning

confidence: 99%

EBSD Characterization of Bobbin Friction Stir Welding of AA6082-T6 Aluminium Alloy

Tamadon

Pons

Clucas

2020

Advances in Materials Science

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Electron Backscatter Diffraction (EBSD) was used to determine microstructural evolution in AA6082-T6 welds processed by the Bobbin Friction Stir Welding (BFSW). This revealed details of grain-boundaries in different regions of the weld microstructure. Different polycrystalline transformations were observed through the weld texture. The Stirring Zone (SZ) underwent severe grain fragmentation and a uniform Dynamic Recrystallisation (DRX). The transition region experienced stored strain which changed the grain size and morphology via sub-grain-boundary transformations. Other observations were of micro-cracks, the presence of oxidization, and the presence of strain hardening associated with precipitates. Flow-arms in welds are caused by DRX processes including shear, and low and high angle grain boundaries. Welding variables affect internal flow which affects microstructural integrity. The shear deformation induced by the pin causes a non-uniform thermal and strain gradient across the weld region, leading to formation of mixed state transformation of grain morphologies through the polycrystalline structure. The grain boundary mapping represents the differences in DRX mechanism I different regions of the weld, elucidates by the consequences of the thermomechanical nature of the weld. The EBSD micrographs indicated that the localised stored strain at the boundary regions of the weld (e.g. flow-arms) has a more distinct effect in emergence of thermomechanical nonuniformities within the DRX microstructure.

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Section: Ebsd General Texture Evaluationmentioning

confidence: 99%

EBSD Characterization of Bobbin Friction Stir Welding of AA6082-T6 Aluminium Alloy

Tamadon

Pons

Clucas

2020

Advances in Materials Science

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“…This may be due to the short peening time, which was in this case 1 min. 4. Based on the test results, it was found that there is a strong correlation between stresses in the FSW welded joint and the force at which the sample is destroyed.…”

Section: Discussionmentioning

confidence: 98%

“…During FSW method, the material does not melting and the joints is free of typical defects arising in the solidification process, such as precipitation, segregation or gas porosity as is the case with remelting processes. This method can be used to join the materials which are difficult to join using conventional welding [3] such as aluminum alloys [4] copper [5], magnesium alloy [6,7], steels [8] or even dissimilar materials [9,10]. The resulting weld has an equiaxial shape and its grains reach a size of 1-10 µm.…”

Section: Introductionmentioning

confidence: 99%

Application of the 3D Digital Image Correlation to the Analysis of Deformation of Joints Welded With the FSW Method After Shot Peening

Trzepieciński

Bucior

Kluz

et al. 2019

Advances in Materials Science

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The three dimensional Digital Image Correlation (3D DIC) method is used for measurements of deformations and displacement in plane elements exposed to loading. The paper presents the experimental tests of an application of the ARAMIS system to the analysis of deformation of joints welded with the FSW method after shot peening treatment. The butt joints were made of 2024-T3 aluminum alloy sheets with the thickness of 1 mm, which next were peened with glass beads about granulation in range 500 ÷ 900 µm. Tests of residual stresses by X-ray diffraction were also carried out. The aim of the study was to analyze the impact of shot peening on the value of stresses and the location of deformations in butt joints.

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“…It is also concluded that lower welding speed and higher amount of heat input per unit length of the joint help properly consolidate the plasticized material in the nugget zone. On the contrary, with further increase in welding speed to 30 mm min −1 and 35 mm min −1 , the reduction in tensile and impact strength is observed [27,28]. Improper consolidation of plasticized material and interlayer particles is the reason for low tensile and impact strength.…”

Section: Effect Of Welding Speedmentioning

confidence: 97%

Effect of process parameters on friction stir welding of aluminium alloy AA6082–T6 with an interlayer using response surface methodology

Singh,

Kumar,

Grover

2023

Eng. Res. Express

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In the present study, the effects of variation of process parameters on the mechanical properties of friction stir welded A6082–T6 aluminium alloy joints with Zinc (Zn) interlayer are experimentally investigated. Four process parameters, viz. rotational speed, welding speed, interlayer thickness and tool pin diameter are selected to fabricate the Friction Stir Welding (FSW) joints. After filling the Zn particles into the gap maintained between the plates, FSW is performed using different process parameters. Thereafter, tensile and impact strength tests are performed to evaluate the performance of the joints. It is analyzed that the tensile and impact strength of the joints vary from 121 to 197 MPa and 6 to 17 J, respectively. Subsequently, mathematical models are developed using Response Surface Methodology (RSM) to predict the effect of FSW process parameters on the tensile and impact strength of joints. Analysis of Variance (ANOVA) is used to check the level and degree of direct effect of process variables on the tensile and impact strength of the joints. It is observed from the results that tool rotational speed is the most influential process parameter, which enhances the mechanical properties of FSW joints, whereas an increase in welding speed reduces the mechanical properties of the joints

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Increasing of the Mechanical Properties of Friction Stir Welded Joints of 6061 Aluminum Alloy by Introducing Alumina Particles

Cited by 7 publications

References 24 publications

EBSD Characterization of Bobbin Friction Stir Welding of AA6082-T6 Aluminium Alloy

EBSD Characterization of Bobbin Friction Stir Welding of AA6082-T6 Aluminium Alloy

Application of the 3D Digital Image Correlation to the Analysis of Deformation of Joints Welded With the FSW Method After Shot Peening

Effect of process parameters on friction stir welding of aluminium alloy AA6082–T6 with an interlayer using response surface methodology

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