Numerical Study of the Mechanical Behavior and Fatigue in a Weld Bead by Friction Stir for a 6082-T6 Aluminum Alloy

Kambouz, Youb; Benguediab, M.; Bouchouicha, Benattou; Mazari, Mohamed

doi:10.3311/ppme.9212

Cited by 5 publications

(5 citation statements)

References 16 publications

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“…From this perspective, the longitudinal stress results in the numerical study shown in the Figs. (10,11,12,13), are comparable to the micro-hardness results, obtained by GHAZI [3]. The inverse relationship is shown in Fig.…”

Section: Comparison With the Validation Study: Stress -Microhardness Relationshipsupporting

confidence: 86%

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Simulation of the behavior of aluminum alloys welded in Friction Stir Welding FSW

Taha

Bouchouicha

Ghazi

2018

Frattura Ed Integrità Strutturale

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The friction stir welding FSW is a topical technique to date, either for experimental or numerical research topics. Based on the fact that the majority of the heat generated, comes from the contact between the workpiece and the shoulder, and from the work of friction done by the pin. Thus, it is crucial to approach the reality, by simulating the most of the conditions, related to the FSW process. The development of a numerical model allows us, not only to simulate the FSW welding process, but also to conduct a parametric study and vary the welding conditions as desired. Therefore, a numerical study is conducted on the friction stir welding of AA 5083H111 work piece, in order to perceive the optimal settings. A three dimensional model designed by ANSYS APDL was used. Before proceeding with this, a preliminary experimental study was carried out on FSW welded AA 6082 -T6 specimens and base material, using tensile and fatigue tests. The numerical results obtained, essentially longitudinal residual stresses, are compared to other studies, experimental and numerical.

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Section: Comparison With the Validation Study: Stress -Microhardness Relationshipsupporting

confidence: 86%

“…There are the nugget region, the thermo-mechanically affected zone TMAZ and the heat affected zone HAZ. Each region has qualitatively or quantitively distinct values of microstructure, hardness and residual stress [11].…”

Section: Influence Of Welding Speed On Longitudinal Residual Stressmentioning

confidence: 99%

Simulation of the behavior of aluminum alloys welded in Friction Stir Welding FSW

Taha

Bouchouicha

Ghazi

2018

Frattura Ed Integrità Strutturale

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“…In general, fatigue behavior of welded materials is complicated by large variation in nature and properties of materials, presence of geometric defects and many factors intrinsic (inclusions, lack of penetration, gas pore), etc. [2][3][4][5][6][7][8]. Many studies show that, from such defects, the stage of initiation of the fatigue crack can be reduced [9] and that consequently a large part of the life of the welded joints subjected to fatigue propagation occurs [10].…”

Section: Introductionmentioning

confidence: 99%

Fatigue crack propagation in welded joints X70

Deliou

Bouchouicha

2018

Frattura Ed Integrità Strutturale

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Structural failure assessment approaches take into account local parameters, specimen geometry, loading and material. In the case of welded joints, in addition to these parameters, consideration must be given to the effect of the heterogeneity of properties due to welding. The objective of our work is to study the fatigue crack propagation of welded joint in API X70 pipeline steel. This experimental study focused on welded joints in the different parts, base metal, weld metal and heat affected zone. The concepts of fracture mechanics are used to analyze the harmfulness of defects in welded joints and the main part of fatigue life falls on the crack propagation. The results obtained show that the fatigue crack propagation rate of cracks in the heat affected zone is delayed compared to the other zones. The effect of the microstructure and the quality of submerged arc welding of the studied X70 steel are significant. Tensile tests, hardness and measurement of energetically parameters complemented this work.

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“…a/W=0.3 a/W=0.5 a/W=0.7 Also for welded specimens (Figure 12), it is noticed a high difference for stress intensity factor KI in function of loading angles and ratio a/W. This is attributed to the level of compressive residual stress at the nugget comparatively to Heat Affected Zone or base metal (i.e., Low micro hardness in nugget zone) [30,31] and the calculation in taking out of the empirical stress intensity factor compared to the numerical results using J-integral contour.…”

Section: Stress Intensity Factorsmentioning

confidence: 90%

Experimental and Numerical Study of Fracture Behavior under Mixed-Mode of Al-Alloy AA3003 Not Welded and Welded by FSW Process

Mebarki¹,

Kebir²,

Benguediab³

et al. 2022

ACSM

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This study presents an experimental and computational analysis of fracture under mixed-mode conditions in aluminum alloy AA3003 using the Compact Tension Shear CTS specimen, both not welded and Friction stir welded. Mixed-mode fracture experiments were performed using the CTS specimen and an ARCAN loading device based on Richard's principle suitable for mixed-mode. The approach of linear elastic fracture mechanics allows for a better understanding of mixed-mode failure and the evaluation of the stress intensity parameters KI and KII. The variation of the stress intensity factor KI, KII is influenced by the pre-cracks length. The comparison between experimental results and the numerical results of simulation shows that there is a good agreement between these results.

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Numerical Study of the Mechanical Behavior and Fatigue in a Weld Bead by Friction Stir for a 6082-T6 Aluminum Alloy

Abstract: Abstract

Cited by 5 publications

References 16 publications

Simulation of the behavior of aluminum alloys welded in Friction Stir Welding FSW

Simulation of the behavior of aluminum alloys welded in Friction Stir Welding FSW

Fatigue crack propagation in welded joints X70

Experimental and Numerical Study of Fracture Behavior under Mixed-Mode of Al-Alloy AA3003 Not Welded and Welded by FSW Process

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