Influence of Processing Conditions on the Mechanical Properties of Aluminium Overlap Joints: A Case Study

Bergmann, J.P.; Herold, S.

doi:10.1007/bf03263462

Cited by 5 publications

(6 citation statements)

References 4 publications

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“…Therefore, transition of the failure mode from weld root failure (S4-F100 and S6-F150) to fusion zone failure (S2-F50) is observed in this study as the root angle decreases (Figure 13). This type of transition of failure mode was also reported in a study by Bergmann and Herold [45].…”

Section: Weld Tensile Strength and Fatigue Durabilitysupporting

confidence: 83%

Effect of Micro Solidification Crack on Mechanical Performance of Remote Laser Welded AA6063-T6 Fillet Lap Joint in Automotive Battery Tray Construction

et al. 2021

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Remote laser welding (RLW) has shown a number of benefits of joining 6xxx aluminium alloys such as high processing speed and process flexibility. However, the crack susceptibility of 6xxx aluminium alloys during RLW process is still an open problem. This paper experimentally assesses the impact of transverse micro cracks on joint strength and fatigue durability in remote laser welding of AA6063-T6 fillet lap joints. Distribution and morphology of transverse micro cracks were acquired by scanning electron microscope (SEM) on cross-sections. Grain morphology in the weld zone was determined by electron backscatter diffraction (EBSD) while static tensile and dynamic fatigue tests were carried out to evaluate weld mechanical performance. Results revealed that increasing welding speed from 2 m/min to 6 m/min did not introduce additional transverse micro cracks. Additionally, welding at 2 m/min resulted in tensile strength improvement by 30% compared to 6 m/min due to the expansion of fusion zone, measured by the throat thickness, and refinement of columnar grains near fusion lines. Furthermore, the weld fatigue durability is significantly higher when fracture occurs in weld root instead of fusion zone. This can be achieved by increasing weld root angle with optimum weld fatigue durability at around 55°.

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Section: Weld Tensile Strength and Fatigue Durabilitysupporting

confidence: 83%

Effect of Micro Solidification Crack on Mechanical Performance of Remote Laser Welded AA6063-T6 Fillet Lap Joint in Automotive Battery Tray Construction

et al. 2021

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“…According to the experimental S-N curves of 4-mmthick TIG weldment and 4-mm-thick VB specimen, the thickness corrections were carried out using equations (8) and (9). After the mean stress correction was conducted by re-applying equations (5) and (6), the predicted life and experimental life were compared.…”

Section: Size Effectmentioning

confidence: 99%

“…The 10-mm-thick S-N curves could be derived via equations (8) and (9) and 4-mm-thick experimental S-N curves. Figure 14 plots the S-N curve for TIG welding that was obtained by applying the thickness correction (equation (8)); the S-N curve for VB that was obtained by applying the tensile strength-based thickness correction (equation (9)).…”

Section: Size Effectmentioning

confidence: 99%

“…6 The fatigue properties of welded structures are function of welding material, shape of the welded structure, radius of weld toe, weld angle, height of the reinforcement, and welding quality. [7][8][9][10] With respect to the studies on the fatigue in aluminum alloy weldments, most literature discussed the fatigue behaviors of weldments prepared by the molten welding methods, such as inert-gas metal-arc welding, 11 TIG welding, [12][13][14] and friction stir welding. [15][16][17][18][19] Few studies investigated the diffusion-bonding weldments.…”

Section: Introductionmentioning

confidence: 99%

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Fatigue properties of 6061-T6 aluminum alloy butt joints processed by vacuum brazing and tungsten inert gas welding

Lin

Hwang

Fung

2016

Advances in Mechanical Engineering

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Tungsten inert gas welding and vacuum brazing butt joints of Al-Mg-Si alloy 6061 in the artificially aged condition T6 were studied. Constant amplitude and variable amplitude fatigue loading tests were performed. The experimental S-N curves were compared with the fatigue design curves recommended by the International Institute of Welding, British Standard, and Eurocode 9. Two mean stress correction methods, Goodman and Gerber, were evaluated. In terms of the size effect on the fatigue life, this article proposed an innovational thickness correction method based on the ratio of the ultimate tensile strengths of specimens with different thickness. For vacuum brazing components, the tensile strengthbased thickness correction method was better than the thickness correction methods recommended by the International Institute of Welding and Eurocode 9.

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“…Gas tungsten arc welding (GTAW) is most usually used to weld copper thick plates. For an appropriate penetration depth, the preheating temperature must be over 400°C if Ar shielding gas arc is used to weld a copper plate with the thickness of 6 mm [1], He or N 2 shielding arc can be used to weld copper thick plates without preheating [2][3][4][5]. But till now, the heat characteristics of Ar, He or N 2 arc welding for copper thick plates are not clear.…”

Section: Introductionmentioning

confidence: 99%

Heating Characteristics of Gas Tungsten Arc Welding of Copper Thick Plates with Shielding Gas of Argon, Helium or Nitrogen

Yan

Zhao

et al. 2007

KEM

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The welding temperature patterns of gas tungsten arc welding for copper thick plates during Ar, He or N2 shielded arc welding were simulated, and the size of weld pools and heat-affected zones have been compared. It was predicted that the heat-affected zone in the welded joints during Ar arc welding is the widest and that during N2 arc welding is the narrowest, while the size of weld pools using Ar (preheating at 400°C), He and N2 (without preheating) shielding arc welding is very similar. Among the three kinds of gases shielded arc welding, the temperature gradient of welded joints during Ar arc welding is the least and that during N2 arc welding is the greatest. The temperature rise velocity at the arc center during N2 arc welding is the highest, and those at the zone close to the weld pool of welded joints during He arc and N2 arc welding are a few higher than that during Ar arc welding.

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Influence of Processing Conditions on the Mechanical Properties of Aluminium Overlap Joints: A Case Study

Cited by 5 publications

References 4 publications

Effect of Micro Solidification Crack on Mechanical Performance of Remote Laser Welded AA6063-T6 Fillet Lap Joint in Automotive Battery Tray Construction

Effect of Micro Solidification Crack on Mechanical Performance of Remote Laser Welded AA6063-T6 Fillet Lap Joint in Automotive Battery Tray Construction

Fatigue properties of 6061-T6 aluminum alloy butt joints processed by vacuum brazing and tungsten inert gas welding

Heating Characteristics of Gas Tungsten Arc Welding of Copper Thick Plates with Shielding Gas of Argon, Helium or Nitrogen

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