Optimization of FS Welding Parameters for Improving Mechanical Behavior of AA2024-T351 Joints Based on Taguchi Method

Vidal, Catarina; Infante, V.

doi:10.1007/s11665-013-0499-x

Cited by 35 publications

(14 citation statements)

References 28 publications

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“…The welding process was carried out under vertical downward force control. Among the FSW parameters it was decided to vary only three parameters: vertical force tool travel speed and tool rotational speed; since for a given tool geometry and clamping system, these three parameters control the welded seam quality including the weld defects observed [18].…”

Section: Materials and Friction Stir Welding Conditionsmentioning

confidence: 99%

Study of the fatigue behaviour of dissimilar aluminium joints produced by friction stir welding

Infante

Braga

Duarte

et al. 2016

International Journal of Fatigue

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Section: Materials and Friction Stir Welding Conditionsmentioning

confidence: 99%

Study of the fatigue behaviour of dissimilar aluminium joints produced by friction stir welding

Infante

Braga

Duarte

et al. 2016

International Journal of Fatigue

Self Cite

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“…The defects were formed as a result of insufficient heat input caused by higher traverse speed as well as low rotation speeds or an unsuitable combination of both. Lower traverse speeds and higher rotation speeds also influenced several weld defects such as excessive flash [15]. …”

Section: Resultsmentioning

confidence: 99%

“…In this study the higher-is-better is employed for all three objectives namely the tensile strength, nugget zone hardness profile and weld quality class classification, whereby a higher magnitude of these objectives will act favorably towards achieving higher fatigue resistance properties of the joint. The nugget zone hardness which has great influence on fatigue life cycle of aluminum alloys is directly proportional to the joint tensile strength [15]. The MSD employing the higher-is-better was calculated using the following equations:…”

Section: Taguchi and Multi-objective Taguchi Methodsmentioning

confidence: 99%

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Model development for mechanical properties and weld quality class of friction stir welding using multi-objective Taguchi method and response surface methodology

2015

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This study presents the effect of the governing parameters in friction stir welding (FSW) on the mechanical properties and weld quality of a 6mm thick 6061 T651 Aluminum alloy butt joint. The main FSW parameters, the rotational and traverse speed were optimized based on multiple mechanical properties and quality features, which focus on the tensile strength, hardness and the weld quality class using the multi-objective Taguchi method (MTM). Multi signal to noise ratio (MSNR) was employed to determine the optimum welding parameters for MTM while further analysis concerning the significant level determination was accomplished via the well-established analysis of variance (ANOVA). Furthermore, the first order model for predicting the mechanical properties and weld quality class is derived by applying response surface methodology (RSM). Based on the experimental confirmation test, the proposed method can effectively estimate the mechanical properties and weld quality class which can be used to enhance the welding performance in FSW or other applications.

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“…Since it is purely a solid phase-mechanical process, this technique avoids the problems related to material solidification. Even though it is a solid phase technique, many problems related to weld defects persist in FSW have been noticed by researchers (Balaji and Mahapatra 2012;Vidal and Infante 2013). Thus, in general the joint strength of the weld zone is reduced significantly, especially in heat affected zone (HAZ), thermo mechanically affected zone (TMAZ) moreover, it is applicable to age hardenable aluminum alloys.…”

Section: Introductionmentioning

confidence: 99%

Tensile Properties Improvement on Friction Stir Welded Age-Hardenable Aluminum Alloys: An Evolutionary Approach using RSM based GA and SA

2016

Rev. Téc. Ing. Univ. Zulia.

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AA2024 and AA6061 aluminum alloys were fabricated using the friction stir welding technique to improve the tensile properties such as ultimate tensile strength (UTS) and tensile elongation (TE). The BoxBehnken design matrix with four significant factors-rotational speed (X(1)), welding speed (X(2)), axial load (X(3)), and pin shape (X(4)), each having three levels-was used with response surface methodology to develop a mathematical model. The experiments yielded ultimate tensile strength of 141 MPa at 12% tensile elongation. The obtained tensile properties of fabricated weld joints were low when compared to those of base materials. Several voids and pinholes were found, these being the consequence of poor tensile properties on the fabricated weld joints. Therefore, to maximize the tensile properties, two computational approaches were employed: a genetic algorithm and a simulated annealing algorithm. The main objectives of applying these computational approaches were: (1) to maximize the UTS and TE compared to the welding performance value of the experimental data and regression modeling; (2) to estimate the optimal process parameter values that must be within the obtained range of the minimum and maximum values; and (3) to evaluate the number of iterations generated by the computational approaches. The results show that use of the computational approaches resulted in significant improvement in the tensile properties. Comparing the genetic algorithm with the simulated annealing algorithm, the latter maximizes the tensile properties of fabricated AA2024 and AA6061 aluminum alloy weld joints; however, a considerable number of iterations and substantial amount of time was required to achieve a global optimal solution.

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Optimization of FS Welding Parameters for Improving Mechanical Behavior of AA2024-T351 Joints Based on Taguchi Method

Cited by 35 publications

References 28 publications

Study of the fatigue behaviour of dissimilar aluminium joints produced by friction stir welding

Study of the fatigue behaviour of dissimilar aluminium joints produced by friction stir welding

Model development for mechanical properties and weld quality class of friction stir welding using multi-objective Taguchi method and response surface methodology

Tensile Properties Improvement on Friction Stir Welded Age-Hardenable Aluminum Alloys: An Evolutionary Approach using RSM based GA and SA

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