The optimum combination of tool rotation rate and traveling speed for obtaining the preferable corrosion behavior and mechanical properties of friction stir welded AA5052 aluminum alloy

Hariri, Mohiedin Bagheri; Shiri, Sajad Gholami; Yaghoubinezhad, Yadollah; Rahvard, Masoud Mohammadi

doi:10.1016/j.matdes.2013.03.027

Cited by 57 publications

(25 citation statements)

References 51 publications

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“…Due to the higher pressure on the upper plate, established as the result of friction in the upper plate shoulder rather than the bottom plate, the average grain size in the top half of the nugget was smaller than that in the bottom half for both welding conditions. In addition, Hariri et al 22 proved that by increasing the (ω 2 /ʋ) ratio, the maximum friction heat generation (i.e., Heat index) in the WNZ increases, generating coarse recrystallized grains in the weld nugget zone. Therefore, the average grain size in the weld nugget zone of FSLW 2 was larger than that of FSLW 1.…”

Section: Results Of the Metallographic Observationmentioning

confidence: 99%

“…In some of the more complicated multi-pass processes compared to the FSW (e.g., equal channel angular pressing), the influence of texture variation (in addition to the grain size) on corrosion behavior should be considered 22,23 . However, during FSW, the extensive shear plastic deformation is the primary phenomenon, leading to a dynamic recrystallized fine grain microstructure in the WNZ 8,24 .…”

Section: Electrochemical Behaviormentioning

confidence: 99%

“…Consequently, the corrosion resistance of the FSLW 1 is higher than that of the FSLW 2 at both the top and bottom halves of the WNZ. Based on Equation 2, by increasing the (ω/ʋ) ratio, the heat index in the WNZ increases, generating the coarse recrystallized grains in the WNZ 8,22,25 . In this regard, due to the increasing heat index in the FSLW 2 with respect to the FSLW 1, the grain size in both halves of the WNZ for FSLW 2 is smaller than that of FSLW 1.…”

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Investigation of the nugget zone corrosion behavior in friction stir welded lap joints of 6061-T6 aluminum alloy

et al. 2014

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The corrosion behavior at different positions (top and bottom) of the weld nugget zone along the thickness plates in AA6061-T6 aluminum alloys welded by friction stir lap welding, under the conditions of 1000 rpm-60 mm/min and 900 rpm-40 mm/min in a 3.5 wt% NaCl solution, was investigated by Tafel polarization at ambient temperature. The morphology of the nugget zone corroded surfaces was analyzed by scanning electron microscopy together with energy dispersive spectroscopy (SEM-EDS) as well as atomic force microscopy (AFM). It was found that the top half of the nugget zone has a better corrosion resistance than that of the bottom half for both welding conditions. A localized pit dissolution with combined intergranular corrosion are the dominant corrosion types across different positions of the nugget zone for various welding conditions and in the parent alloy.

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Section: Results Of the Metallographic Observationmentioning

confidence: 99%

Section: Electrochemical Behaviormentioning

confidence: 99%

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confidence: 99%

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Investigation of the nugget zone corrosion behavior in friction stir welded lap joints of 6061-T6 aluminum alloy

et al. 2014

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“…In friction stir welding, high temperature below the melting point is attained through friction between tool shoulder and joining sheets as well as frictional heat produced by tool pin and the semi-solid material through the plastic flow of materials under the tool shoulder. Effect of different parameters on welding joint strength has been investigated by many researchers (Aydin, Tutar, Durmuş, Bayram, & Sayaca, 2012;Bagheri Hariri, Gholami Shiri, Yaghoubinezhad, & Mohammadi Rahvard, 2013;Kumar & Kailas, 2008;Verma & Misra, 2015). Taguchi with grey relational analysis has been used by many researchers in their respective fields for optimisation of processes (Ghetiya, Patel, & Kavar, 2016;Kasman, 2013;Kesharwani, Panda, & Pal, 2014;Singh & Kumar, 2006a, 2006b.…”

Section: Introductionmentioning

confidence: 99%

Friction stir welding: multi-response optimisation using Taguchi-based GRA

Kundu

Singh

2016

Production & Manufacturing Research

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In present experimental work, friction stir welding of aluminium alloy 5083-H321 is performed for optimisation of process parameters for maximum tensile strength. Taguchi's L 9 orthogonal array has been used for three parameters -tool rotational speed (TRS), traverse speed (TS), and tool tilt angle (TTA) with three levels. Multi-response optimisation has been carried out through Taguchi-based grey relational analysis. The grey relational grade has been calculated for all three responsesultimate tensile strength, percentage elongation, and micro-hardness. Analysis of variance is the tool used for obtaining grey relational grade to find out the significant process parameters. TRS and TS are the two most significant parameters which influence most of the quality characteristics of friction stir welded joint. Validation of predicted values done through confirmation experiments at optimum setting shows a good agreement with experimental values.

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“…On the other side, it was reported that the ultimate strength of the welded joints produced by friction stir welding (FSW) technique reached 80-100 % of the parent metal [8]. FSW is a solid-state joining process proposed at the TWI organizations in 1991 in which a rotating tool is plunged into the workpieces and traverses along the weld path.…”

Section: Introductionmentioning

confidence: 99%

Study on the effects of friction stir welding process parameters on the microstructure and mechanical properties of 5086-H34 aluminum welded joints

Jamalian

Farahani

Givi

et al. 2015

Int J Adv Manuf Technol

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In this study, the effects of tool rotational and traverse speeds on the mechanical properties and the microstructure of the friction stir welded joints from Al 5086-H34 were studied. Insufficient heat generation and inadequate metal transportation at very low rotational speed and high turbulence in the plasticized metal at very high rotational speed emerged tunnel and worm hole defects into the weldment. It was discovered that as rotational and traverse speed increased, the average grain size of the weldment decreased due to more dynamic recrystallization and amplified stirring effect. An increase in the rotational speed increased the ultimate tensile strength and microhardness of the specimens. At the best welding condition, by employing the rotational and traverse speeds of 1250 rpm and 80 mm/min, respectively, 51 % enhancement in the elongation and 8 % increase in the microhardness of the welded samples were obtained. Moreover, the ultimate tensile strength of this welded joint reached to 85 % of the base metal.

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The optimum combination of tool rotation rate and traveling speed for obtaining the preferable corrosion behavior and mechanical properties of friction stir welded AA5052 aluminum alloy

Cited by 57 publications

References 51 publications

Investigation of the nugget zone corrosion behavior in friction stir welded lap joints of 6061-T6 aluminum alloy

Investigation of the nugget zone corrosion behavior in friction stir welded lap joints of 6061-T6 aluminum alloy

Friction stir welding: multi-response optimisation using Taguchi-based GRA

Study on the effects of friction stir welding process parameters on the microstructure and mechanical properties of 5086-H34 aluminum welded joints

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