A Comparison of FSW, BHLW and TIG Joints for Al-Si-Mg Alloy (EN AW-6082 T6)

Walter, V.; Weidenmann, Kay André; Schulze, Volker

doi:10.1016/j.procir.2014.06.118

Cited by 11 publications

(9 citation statements)

References 3 publications

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“…The hardness of HAZ is usually neither higher than that of the FZ nor similar to the parent metal. 27,28 In this welding process, the applied heat input of 150 J/mm causes incomplete penetration and imperfect joints. When a specified heat input at 270 J/mm causes the formation of the field of weld area, which severely affects the hardness at HAZ, the failures that occur at the interface due to the recrystallisation process ultimately reduce the strength in aluminium alloy joints.…”

Section: Effect Of Heat Distribution On Mechanical Propertiesmentioning

confidence: 99%

Investigation of heat input effects on the joint characteristics of CMT welded Aa6061 sheets

Selvamani

Bakkiyaraj²,

Balasubramanian

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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Cold Metal Transfer (CMT) arc welding is an updated version of the GMAW process, in which heat input is significantly reduced due to the push-pull action of filler wire feeding during welding. The aluminium alloy sheets are welded by the CMT arc welding process using different heat input levels in this research work. The temperature distribution during welding is experimentally measured with the help of an infrared thermometer, and finite element analysis (volumetric heat source model) is used to predict the temperature distribution, and these results are equated. The influence of heat input on joint characteristics such as bead geometry, microhardness variation, microstructure analysis and tensile properties is also being investigated experimentally. The temperature study reveals that the results of numerical modelling for temperature distribution using various heat inputs were very close to the experimental condition, with a less significant difference ±5. In addition, the well-controlled heat input at 210 J/mm was attributed to eradicating porosity, which was confirmed by Non-destructive evaluation, macrostructure and microstructure analysis. As a result, the joint produced a better tensile strength of 241 MPa due to the achievement of fine grain refinement of 17 µm in the weld zone, reduced heat affect zone, and 6.45% volume fraction of Mg2Si particles. The intercept length of 18.937 microns is measured as the average value, and the misorientation angle of 25.2922 was also found as the average in the fusion zone, which is more significant when compared to the base metal value of 20 μm.

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Section: Effect Of Heat Distribution On Mechanical Propertiesmentioning

confidence: 99%

Investigation of heat input effects on the joint characteristics of CMT welded Aa6061 sheets

Selvamani

Bakkiyaraj²,

Balasubramanian

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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show abstract

“…Welding thermal cycles significantly affect the mechanical properties and microstructure of the heat-affected zone (HAZ) [8][9][10][11][12]. Because the mechanical behavior and the final microstructure of weldments are mainly a function of the welding thermal cycle [7,[13][14][15][16], the latter must be investigated and correctly predicted. Walter et al [14] attributed the variation in hardness across the HAZ and in the tensile properties in different welding processes to microstructural variations.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Thermal Mechanical Behavior of Arc-Welded Aluminum Alloy 6061-T6

Arhumah,

Pham

2024

JMMP

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In this study, the welding thermal cycle, as well as the microstructural and mechanical properties of welded AA6061-T6 plates, were studied. The plates were prepared and bead-on-plate welded using gas metal arc welding (GMAW). Numerical simulations using SYSWELD® were performed to obtain the thermal distribution in the welded plates. The numerical heat source was calibrated using the temperatures obtained from the experimental work and the geometry of the melting pool. The mechanical properties were obtained through microhardness tests and were correlated with the welding thermal cycle. Moreover, the mechanical behavior and local deformation in the heat-affected zone (HAZ) were investigated using micro-flat tensile (MFT) tests with digital image correlation (DIC). The mechanical properties of the subzones in the HAZ were then correlated with the welding thermal cycle and with the microstructure of the HAZ. It was observed that the welding thermal cycle produced microstructural variations across the HAZ, which significantly affected the mechanical behavior of the HAZ subzones. The results revealed that MFT tests with the DIC technique are an excellent tool for studying the local mechanical behavior change in AA6061-T6 welded parts due to the welding heat.

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“…The heat-treatable 6XXX Al alloys with their superior properties, such as high specific strength, good deformability, and significant corrosion resistance are commonly used engineering materials in aerospace, automotive, and shipbuilding in order to reduce weight and fuel consumption [1][2][3][4][5][6]. By considering the application areas, gas tungsten arc welding (GTAW) and gas metal arc welding (GMAW) are extensively employed methods for joining aluminum alloys due to their high productivity, applicability, and excellent versatility features [3,[7][8][9].…”

Section: Introductionmentioning

confidence: 99%

A Survey on Post-Weld Modification of Microstructural and Mechanical Properties of GTAWed Aluminum Butt Joints Through FSP and T6 Heat Treatment

2022

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Fusion welding is a commonly applied manufacturing process in all fields of industry. Some imperfections (formation of coarse-grained microstructure, decrease in mechanical property, etc.) can occur especially in the fusion welding-based fabrication of aluminum alloys which have specific features, such as having high thermal conductivity, expansion coefficient, high hydrogen solubility in the liquid state, and oxide layer on the surface. Therefore, the enhancement of microstructure and mechanical properties in terms of the lifespan and strength of the fusion-welded joints is crucial for most applications. In the study, the effects of friction stir processing (FSP) and T6 heat treatment, applied as post-weld processing, on the weld zone properties of the gas tungsten arc welded (GTAWed) AA6082 plates were investigated. The effects of the post-weld processings (FSP and T6 heat treatment) on mechanical and microstructural features were analyzed via microstructural examination and microhardness measurements and tensile strength testing. It was observed that the dendritic microstructure in the processed region (stir zone) of the weld bead was destroyed and fine-grained microstructure was formed via FSP. Additionally, the findings showed that heat input occurred during FSP led to broaden of heat affected zone (HAZ) and decrease the hardness in a wider region. It was also determined that the mechanical characteristics of the GTAWed joint were increased but in contrast, the toughness was decreased through T6 post-weld heat treatment.

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A Comparison of FSW, BHLW and TIG Joints for Al-Si-Mg Alloy (EN AW-6082 T6)

Cited by 11 publications

References 3 publications

Investigation of heat input effects on the joint characteristics of CMT welded Aa6061 sheets

Investigation of heat input effects on the joint characteristics of CMT welded Aa6061 sheets

Microstructure and Thermal Mechanical Behavior of Arc-Welded Aluminum Alloy 6061-T6

A Survey on Post-Weld Modification of Microstructural and Mechanical Properties of GTAWed Aluminum Butt Joints Through FSP and T6 Heat Treatment

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