Fatigue behavior of friction stir welded Al–Mg–Sc alloy

Besel, Michael; Besel, Yasuko; Mercado, Ulises Alfaro; Kakiuchi, Toshifumi; Uematsu, Yoshihiko

doi:10.1016/j.ijfatigue.2015.02.013

Cited by 51 publications

(39 citation statements)

References 15 publications

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“…Unreasonable process parameters are likely to make defects. The summary of stress amplitude-half of the stress range ∆σ corresponding to 95% survival rate-for N f = 10 [6] with the optimal process parameters is shown in Table 1 [24,[39][40][41][42][43][44][45][46][47][48][49][50][51][52][53][54][55][56].…”

Section: Process Parametersmentioning

confidence: 99%

Fatigue of Friction Stir Welded Aluminum Alloy Joints: A Review

Gao

2018

Applied Sciences

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The application fields of friction stir welding technology, such as aerospace and transportation, has high safety requirements and fatigue is the dominant failure mode for weldments. It is of great significance to understand the fatigue properties of friction stir welded joints. This paper provides an overview of the fatigue mechanism, influencing factors, crack growth rate, and fatigue life assessment. It is found that the fatigue performance of friction stir welded joints can be affected by welding process parameters, test environment, stress ratio, residual stress, and weld defect. The optimized process parameters can produce high quality weld and increase the weld fatigue life. Laser peening is an effective post weld treatment to decrease fatigue crack growth rate and improve material fatigue life.

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Section: Process Parametersmentioning

confidence: 99%

Fatigue of Friction Stir Welded Aluminum Alloy Joints: A Review

Gao

2018

Applied Sciences

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“…To date, FSW is a well-established process on all series of aluminum alloys owing to the excellent weldability properties [4][5][6][7].Even so, it is necessary to improve the performance and fatigue lifetime of the FSW joints for quite a long time in the future [8]. FSW is both a thermal-mechanical process without bulk fusion, which can be used to join all the major aluminum alloys and avoids solidification cracking, HAZ liquation cracking, metal porosity, joint softening problem, etc.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Effects of initial oxide on microstructural and mechanical properties of friction stir welded AA2219 alloy

et al. 2015

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“…Moreover, Dalle Donne et al emphasized the risk of erroneous prediction of crack propagation in FSW joints, if residual stresses are not properly accounted for [13]. Besel et al concluded that hardness itself is not the major reason for either fatigue crack nucleation or propagation [14] in FSW joints, whereas they are significantly affected by high residual stress levels in the comparably soft microstructure. Accordingly, Hong et al…”

Section: Introductionmentioning

confidence: 99%

Multiple crack growth prediction in AA2024-T3 friction stir welded joints, including manufacturing effects

Carlone

Citarella

Sonne

et al. 2016

International Journal of Fatigue

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A great deal of attention is currently paid by several industries toward the friction stir welding process to realize lightweight structures. Within this aim, the realistic prediction of fatigue behavior of welded assemblies is a key factor. In this work an integrated finite element method–dual boundary element method (FEM–DBEM) procedure, coupling the welding process simulation to the subsequent crack growth assessment, is proposed and applied to simulate multiple crack propagation, with allowance for manufacturing effects. The friction stir butt welding process of the precipitation hardened AA2024-T3 alloy was simulated using a thermo-mechanical FEM model to predict the process induced residual stress field and material softening. The computed stress field was transferred to a DBEM environment and superimposed to the stress field produced by a remote fatigue traction load applied on a notched specimen. The whole procedure was finally tested comparing simulation outcomes with experimental data. The good agreement obtained highlights the predictive capability of the method. The influence of the residual stress distribution on crack growth and the mutual interaction between propagating cracks were analyzed as well

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Fatigue behavior of friction stir welded Al–Mg–Sc alloy

Cited by 51 publications

References 15 publications

Fatigue of Friction Stir Welded Aluminum Alloy Joints: A Review

Fatigue of Friction Stir Welded Aluminum Alloy Joints: A Review

Effects of initial oxide on microstructural and mechanical properties of friction stir welded AA2219 alloy

Multiple crack growth prediction in AA2024-T3 friction stir welded joints, including manufacturing effects

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