Corrosion performance and mechanical properties of friction stir welded AA2024‐T3 joints under different corrosion solution exposure

Li, N.; Li, W. Y.; Yang, Xiawei; Alexopoulos, Nikolaos D.

doi:10.1002/maco.201609346

Cited by 12 publications

(5 citation statements)

References 38 publications

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“…percent HCl, and exfoliation corrosion solution utilizing submersion and electrochemical methods at the stir zone. The lowest mechanical characteristics and higher mass loss were observed in samples in EXCO solution [ 22 ]. In 3.5 wt.% NaCl solution, the CR levels of the Al alloys prepared using FSW, shielded metal arc welding (SMAW), and GTAW were very low and were moderate in SMAW samples.…”

Section: Introductionmentioning

confidence: 99%

Assessment of the Corrosion Behavior of Friction-Stir-Welded Dissimilar Aluminum Alloys

et al. 2021

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The fuel consumption of high-density automobiles has increased in recent years. Aluminum (Al) alloy is a suitable material for weight reduction in vehicles with high ductility and low weight. To address environmental problems in aircraft and maritime applications, in particular rust development and corrosion, the current study assesses the corrosion behavior during friction stir welding (FSW) of two dissimilar Al alloys (AA6061 and AA8011) in various corrosive conditions using salt spraying and submersion tests. Two acidic solutions and one alkaline solution are used in these tests, which are performed at room temperature. The two specimens (AA6061 and AA8011) and the weld region are suspended in a salt spraying chamber and a 5 wt.% NaCl solution is continually sprayed using the circulation pump for 60 h, with the specimens being weighed every 15 h to determine the corrosion rates. According to the salt spraying data, the weld zone has a higher corrosion resistance than the core components. For twenty-eight days, individual specimens are submerged in 3.5 wt.% HCl + H2O and H2SO4 + H2O solutions and seawater. The weld area specimens exhibit stronger corrosion resistance than the base material specimens, and weight loss in the saltwater medium is lower when compared to the other test solutions, according to the corrosion analysis. The scanning electron microscope (SEM) analysis demonstrates that the base metal AA8011 is considerably corroded on its surface.

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Section: Introductionmentioning

confidence: 99%

Assessment of the Corrosion Behavior of Friction-Stir-Welded Dissimilar Aluminum Alloys

et al. 2021

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“…In the stir zone, severe plastic deformation occurred due to high temperatures and dynamic recrystallization during the welding process. Te microstructure of the stir zone consists of refned grains and second-phase particles expected to be Al 2 CuMg precipitates distributed uniformly [27]. Figure 6(f ) displays the microstructure of TMAZ, which is located between SZ and HAZ, and magnifed views of region E. Te grains in this zone are elongated and oriented in the direction of the material fow.…”

Section: Resultsmentioning

confidence: 99%

Effect of Exfoliation Corrosion on the Mechanical Properties of Friction Stir Spot Welded 2024-T3 AA Joints

Gardi

Kadauw

Hanschel

2023

Advances in Materials Science and Engineering

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This study aims to detect the impact of preexfoliation corrosion on the efficiency of 2 mm thick 2024-T3 aluminum alloy friction stir spot welded (FSSW) joints. Five specimens of FSSW joints, welded with 620 r·min−1 rotational speed and a dwell time of 10 seconds, were immersed in an exfoliation corrosion solution for five different times: 10 h, 20 h, 30 h, 40 h, and 50 h. The tensile shear load for the noncorroded joint was 3.5 kN. The results showed that the degradation of mechanical properties increased with increasing exposure time, and the joint efficiency drop reached 62% for specimens exposed for 50 h to the corroded solution. As welded FSSW 2024-T3 AA joints exhibited a nugget debonding failure mode and a mixed-mode tensile-shear fracture, in the corroded specimens, only a shear fracture could be seen. The results were attributed to a reduction in the bonding area between the upper and lower sheets due to corrosion.

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“…Xu et al studied the time-varying trends of pitting geometrical features for the different zones of Q235 welded joints, as well as the effect of pitting damage on the mechanical properties and fracture behaviors of welded joints [4]. The corrosion resistance of different positions on the joint surface and its effect on joint properties have been investigated under different solutions by Li et al [5]. The microstructural evolution, mechanical properties, and corrosion performance of the thermomechanically affected zone and heat-affected zone were mainly studied to reveal the relationship between the microstructure and properties in different solutions.…”

Section: Introductionmentioning

confidence: 99%

Corrosion Performance of Welded Joints for E40 Marine Steel

Li,

Wu,

Sun

2023

Metals

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Marine steel requires excellent toughness and corrosion resistance in a low-temperature seawater environment. In this study, corrosion tests on E40 steel were performed, including electrochemical testing of the weld metal and heat-affected zone, dynamic corrosion testing in a simulated seawater environment, and the analysis and comparison of results obtained using different methods. The corrosion resistance of E40 was determined by measuring the saturation current density of the anodic dissolution of the steel in a corrosive medium by an electrochemical method. Under laboratory conditions, the corrosion resistance was investigated under simulated seawater. The results showed that regions with uneven microhardness corresponded to the inhomogeneity of the corrosion potential, with measured fluctuations of up to 40 mV. Nanoscale corrosive–aggressive non-metallic inclusions served as a substrate for the deposition of titanium and niobium carbonitrides, thereby weakening the corrosion resistance. The corrosion rate of the base metal was 1.16–1.64 mm/year, which was slightly higher than that of the heat-affected zone. The influence of deposition on the corrosion performance of welded joints under different deoxygenation processes was studied, and the deposition composition was controlled by a deoxygenation process to improve the corrosion resistance of the steel plate.

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Corrosion performance and mechanical properties of friction stir welded AA2024‐T3 joints under different corrosion solution exposure

Cited by 12 publications

References 38 publications

Assessment of the Corrosion Behavior of Friction-Stir-Welded Dissimilar Aluminum Alloys

Assessment of the Corrosion Behavior of Friction-Stir-Welded Dissimilar Aluminum Alloys

Effect of Exfoliation Corrosion on the Mechanical Properties of Friction Stir Spot Welded 2024-T3 AA Joints

Corrosion Performance of Welded Joints for E40 Marine Steel

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