Analysis of tensile strength of AA 2014 and AA 7075 dissimilar metals using friction stir welding

Sivaraman, P.; Nithyanandhan, T.; Karthick, M.; Kirivasan, S.M.; Rajarajan, S.; Sundar, M. Sivanesa

doi:10.1016/j.matpr.2020.04.895

Cited by 9 publications

(9 citation statements)

References 16 publications

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Section: Tensile Strength and Ductilitysupporting

confidence: 73%

“…They assert that joints which failed within the nugget generally experienced inadequate mixing of plasticised material or suffered excessive heat input. Other research is in agreement with this statement (Bandhu et al, 2017;Masoumi et al, 2016;Sivaraman et al, 2021), With reference to Figure 128, the 8 tensile test specimens which failed mid-weld did so within or along the edge of the rough and underfilled rippled area, and generally followed a ragged wavy line as shown on Figure 128(a). The fracture surfaces were dull and matt in appearance.…”

Section: Tensile Testingsupporting

confidence: 70%

“…The weld efficiency of both dissimilar welds decreased in comparison with the similar welds, with the II weld achieving 78.8% efficiency and the ⊥ weld achieving 72.2%. When considering 6 relevant 7 studies in the literature ( (Bandhu et al, 2017) regarding AA2014-AA6061 welds, regarding AA2024-AA7050 welds, (Venkateswara Rao & Senthil Kumar, 2020) regarding AA6061-AA2014 welds, (Masoumi Khalilabad et al, 2021) regarding AA2198-AA2024 welds, (Masoumi et al, 2016) regarding AA2024-AA2198 welds and (Sivaraman et al, 2021) regarding AA2014-AA2075 welds) it was found that the weld efficiency of germane dissimilar materials varied between 42.9% and 94% for the most successful welds produced, with an average (of the 6 results from literature considered) of 71.5%. The results achieved in this research are therefore consistent with that produced in the wider research community.…”

Section: Tensile Testingmentioning

confidence: 99%

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Stationary shoulder friction stir welding of military aircraft sheet alloys

Puckrin¹

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Stationary Shoulder Friction Stir Welding (SSFSW) allows joining of materials without the addition of mass and could be a potential solution to expedient helicopter repair in operational theatre. This research considers the suitability for SSFSW of two aluminium alloys commonly used within the Merlin helicopter airframe, AA8090 and BS L165. Techniques including optical microscopy, hardness, tensile and fatigue testing were used to characterise the two alloys and to establish a baseline for comparison with the welded specimens. The welds were performed in four configurations, with each welded both parallel and perpendicularly to the material’s rolling direction. This was in an effort to establish: the alloy’s suitability for SSFSW in both similar and dissimilar welds; the effect of changing the alloy positioned on the advancing side; and the influence of the material rolling direction on the quality of the weld. Techniques similar to those used in the material characterisation were used to determine the quality of each configuration. Encouraging tensile and fatigue strength results were achieved, especially for the similar materials welds with BS L165 welded parallel to the rolling direction achieving over 100% UTS weld efficiency. Inconsistent quality including the presence of kissing bonds was, however, observed. When welding parallel to the rolling direction, stronger welds were produced with BS L165 positioned on the advancing side. The presence of kissing bonds made analysis of those welded perpendicular to the rolling direction inconclusive. The material rolling direction also had an effect on the weld, as demonstrated through differences in weld appearance, degree of mixing of materials and tensile and fatigue test results. Additionally, a relationship between hardness and tensile strength was determined which revealed close correlation between the governing equation and the test results, with only 7% scatter. This will allow for prediction of tensile strength, based on the measured hardness, when the materials are joined using SSFSW.

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Section: Tensile Strength and Ductilitysupporting

confidence: 73%

Section: Tensile Testingsupporting

confidence: 70%

Section: Tensile Testingmentioning

confidence: 99%

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Stationary shoulder friction stir welding of military aircraft sheet alloys

Puckrin¹

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“…This process is effectively utilized for altering surface structures and improving materials' physical properties. The term friction stir processing (FSP) refers to surface modification through reinforcements in addition to friction stir welding [1][2][3][4][5][6][7][8][9][10]. This research investigates the effects of the novel reinforcement of zirconia particles on the welding zone of the friction stir welding process of the AA8006 work material.…”

Section: Introductionmentioning

confidence: 99%

“…The maximum stirring speed and frequently changes the traverse speed, producing more heat, it can be reduced the wear resistance. As tool pin profile is a major influencing factor, Saravanan et al [ 5 , 6 ] optimized the tool pin profile to improve the welding quality. They utilized the FSW of the dissimilar aluminum alloys of AA 2014 and AA 7075.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of the Friction Stir Weldability of AA8006 with Zirconia Particle Reinforcement and Optimized Process Parameters

et al. 2021

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A lightweight, highly corrosive resistant, and high-strength wrought alloy in the alumi-num family is the Aluminium 8006 alloy. The AA8006 alloy can be formed, welded, and adhesively bonded. However, the recommended welding methods such as laser, TIG (Tungsten Inert Gas welding), and ultrasonic are more costly. This investigation aims to reduce the cost of welding with-out compromising joint quality by means of friction stir welding. The aluminum alloy-friendly re-inforcement agent zirconia is utilized as particles during the weld to improve the performance of the newly identified material AA8006 alloy in friction stir welding (FSW). The objectives of this research are to identify the level of process parameters for the friction stir welding of AA8006 to reduce the variability by the trial-and-error experimental method, thereby reducing the number of samples needing to be characterized to optimize the process parameters. To enhance the quality of the weld, the friction stir processing concept will be adapted with zirconia reinforcement during welding. The friction stir-processed samples were investigated regarding their mechanical proper-ties such as tensile strength and Vickers microhardness. The welded samples were included in the corrosion testing to ensure that no foreign corrosive elements were included during the welding. The quality of the weld was investigated in terms of its surface morphology, including aspects such as the dispersion of reinforced particles on the welded area, the incorporation of foreign elements during the weld, micro defects or damage, and other notable changes through scanning electron microscopy analysis. The process of 3D profilometry was employed to perform optical microscopy investigation on the specimens inspected to ensure their surface quality and finish. Based on the outcomes, the optimal process parameters are suggested. Future directions for further investigation are highlighted.

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Interlock Friction Stir Weld of Dissimilar Aluminum Alloys AA 7075 T6-AA7475 T7 Using a Novel Asymmetric Dual-Pin Tool: Mechanical Properties and Microstructure Characterization

Anand¹,

Padmanabhan²

2022

Metallogr. Microstruct. Anal.

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Analysis of tensile strength of AA 2014 and AA 7075 dissimilar metals using friction stir welding

Cited by 9 publications

References 16 publications

Stationary shoulder friction stir welding of military aircraft sheet alloys

Stationary shoulder friction stir welding of military aircraft sheet alloys

Experimental Investigation of the Friction Stir Weldability of AA8006 with Zirconia Particle Reinforcement and Optimized Process Parameters

Interlock Friction Stir Weld of Dissimilar Aluminum Alloys AA 7075 T6-AA7475 T7 Using a Novel Asymmetric Dual-Pin Tool: Mechanical Properties and Microstructure Characterization

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