High-cycle fatigue and fracture behavior of double-side friction stir welded 6082Al ultra-thick plates

Yang, Chong; Wang, B.B.; Yu, Bo; Wu, L.H.; Xue, P.; Zhang, X.M.; He, Guoai; Ni, D.R.; Xiao, B.L.; Wang, K.S.; Ma, Z.Y.

doi:10.1016/j.engfracmech.2020.106887

Cited by 9 publications

(4 citation statements)

References 52 publications

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“…The significant grain refinement and complex flow of material in the overlap region could be due to the double stirring of the grains. Yang et al 29 observed a similar observation for overlap zone with finegrained structure as compared to the top and bottom region of the SZ during the DS-FSW of Al-6082 T4 alloy. Further, Su et al 30 observed a similar zone know as weld nugget overlap zone (WNOZ) during T-joint on both corners of AA5083 aluminum alloy using SS-FSW.…”

Section: Base Materialssupporting

confidence: 55%

Influence of forging action on the microstructural and mechanical characteristics of the friction stir welded joints of aluminum alloy with varied joint configurations

Thakur

Ojha

Bhadauria

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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The variation in the forging action during single-side friction stir welding (SS-FSW) and double side friction stir welding (DS-FSW) joining of AA-6061 T6 alloy by friction stir welding (FSW) process was conducted. The microscopic study of the stir zone (SZ) of SS-FSW joint configurations showed that the forging action obtained with a 3° tool tilt angle (TTA) provided better intermixing of material, with significant downward and inclined flow of plasticized material under the shoulder interaction zones. This led to the maximum grain refinement as compared to the forging action obtained with 0° and 2° TTA. For DS-FSW joint, a good interlocking between the material stirred during the first and second pass was observed, which led to maximum joint efficiency, and the elimination of the problem of insufficient root penetration observed during the SS-FSW. The misorientation analysis revealed that the percentage of high angle grain boundaries (HAGBs) significantly increased for DS-FSW joint due to the small thermal gradient along the plate thickness. Moreover, the dominance of B/[Formula: see text] shear texture with sufficient dissimilarity in the crystallographic orientation to the random texture was observed within the SZ of DS-FSW joint.

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Section: Base Materialssupporting

confidence: 55%

Influence of forging action on the microstructural and mechanical characteristics of the friction stir welded joints of aluminum alloy with varied joint configurations

Thakur

Ojha

Bhadauria

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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“…Recently researchers such as Rohilla et al [10], Sathari et al [11], Mehra et al [12], He et al [13] and Amlan et al [14] studied the effect of single/double pass FSW (SP/DP-FSW) on joint properties in equal thickness similar material combinations and they reported that DP-FSW resulted in high joint tensile strength, percentage elongation and hardness. Yang et al [15] studied the effect of double-sided FSW on high cycle fatigue property and fracture mode of joints in ultra thick AA6082-T4 palates and it was demonstrated that high-quality joints with improved fatigue life were obtained during double-sided FSW. Further, Chengchao et al [16] studied the effect of double-sided FSW on microstructural and mechanical properties of equal thickness AA6081-T6 joints and it was claimed that pin affected zone (PAZ) had the lowest hardness as compared to shoulder-affected zone (SAZ) owing to low dislocation density and lack of precipitates in PAZ.…”

Section: Introductionmentioning

confidence: 99%

A comparative study on friction stir welding of tailor weld blanks

Majeed

Siddiquee

Mehta

et al. 2022

Materials Science and Technology

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The effect of single-pass (SP) and double-pass (DP) friction stir welding (FSW) on metallographic and mechanical properties of joints was investigated in this study. Uniform temperature distribution across the weld cross-section was obtained during double-pass FSW (DP-FSW). SEM and EDS analyses showed an increase in the fraction of second phase particles (SPPs) and the formation of new SPPs by DP-FSW. An increase in hardness values by 13.3% and a severe decrease in joint efficiency by 46.7% were observed by DP-FSW. Fractography examination of fractured surfaces of welded specimens showed a quasi-cleavage and ductile mode of failure in SP and DP joints, respectively. The potentiodynamic polarisation test of base metal and welded specimens indicated the high corrosion resistance of welded specimens.

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“…However, the aluminium FSW joint sometimes shows poor fatigue performance. Yang et al 10 performed the fatigue test of double‐side fraction stir welded AA6082 joint. The results showed that the failure occurred in the low hardness heat affected zone (HAZ) and SZ which resulted in a shorter fatigue life when compared with the as‐received BM.…”

Section: Introductionmentioning

confidence: 99%

Effect of rolling process on fatigue performance of stir zone of AA6061‐T6 doube‐side friction stir welding joint

Pan

Chen

et al. 2020

Fatigue Fract Eng Mat Struct

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Stir zone (SZ) of AA6061‐T6 double‐side friction stir welding (DS‐FSW) joint with a thickness of 6 mm had a poor fatigue performance compared with that of base metal (BM). The rolling process was employed to improve the fatigue performance of SZ. The results showed that rolling process increased the dislocation density in SZ and remarkably enhanced its fatigue performance. The crack initiation played a key role in the fatigue performance of SZ. It relied on the debonding of lamellar structure in SZ. The debonding of lamellar structure depended on the cracking of fine grain layer in lamellar structure.

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High-cycle fatigue and fracture behavior of double-side friction stir welded 6082Al ultra-thick plates

Cited by 9 publications

References 52 publications

Influence of forging action on the microstructural and mechanical characteristics of the friction stir welded joints of aluminum alloy with varied joint configurations

Influence of forging action on the microstructural and mechanical characteristics of the friction stir welded joints of aluminum alloy with varied joint configurations

A comparative study on friction stir welding of tailor weld blanks

Effect of rolling process on fatigue performance of stir zone of AA6061‐T6 doube‐side friction stir welding joint

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