Fatigue Study of the Pre-Corroded 6082-T6 Aluminum Alloy in Saline Atmosphere

Muñoz, Alejandro Fernández; Buenhombre, José Luis Mier; García-Diez, Ana; Fabal, Carolina Camba; Díaz, Juan José Galán

doi:10.3390/met10091260

Cited by 10 publications

(7 citation statements)

References 28 publications

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“…Corrosion fatigue, which is viewed as a combination of two mechanical behaviours in components, is one of the most significant factors in fatigue analysis [149]. Understanding the fatigue and corrosion behaviour of these materials is crucial in specialised industries like submarines [150,151], aeroplanes [152,153], aviation engine combustion systems [154], and other applications [155,156] because of the development of new manufacturing systems in the modern world.…”

Section: Corrosion-fatigue Interactionmentioning

confidence: 99%

Fracture Behaviour of Aluminium Alloys under Coastal Environmental Conditions: A Review

Alqahtani,

Starr,

Khan

2024

Metals

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Aluminium alloys have been integral to numerous engineering applications due to their favourable strength, weight, and corrosion resistance combination. However, the performance of these alloys in coastal environments is a critical concern, as the interplay between fracture toughness and fatigue crack growth rate under such conditions remains relatively unexplored. This comprehensive review addresses this research gap by analysing the intricate relationship between fatigue crack propagation, fracture toughness, and challenging coastal environmental conditions. In view of the increasing utilisation of aluminium alloys in coastal infrastructure and maritime industries, understanding their behaviour under the joint influences of cyclic loading and corrosive coastal atmospheres is imperative. The primary objective of this review is to synthesise the existing knowledge on the subject, identify research gaps, and propose directions for future investigations. The methodology involves an in-depth examination of peer-reviewed literature and experimental studies. The mechanisms driving fatigue crack initiation and propagation in aluminium alloys exposed to saltwater, humidity, and temperature variations are elucidated. Additionally, this review critically evaluates the impact of coastal conditions on fracture toughness, shedding light on the vulnerability of aluminium alloys to sudden fractures in such environments. The variability of fatigue crack growth rates and fracture toughness values across different aluminium alloy compositions and environmental exposures was discussed. Corrosion–fatigue interactions emerge as a key contributor to accelerated crack propagation, underscoring the need for comprehensive mitigation strategies. This review paper highlights the pressing need to understand the behaviour of aluminium alloys under coastal conditions comprehensively. By revealing the existing research gaps and presenting an integrated overview of the intricate mechanisms at play, this study aims to guide further research and engineering efforts towards enhancing the durability and safety of aluminium alloy components in coastal environments.

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Section: Corrosion-fatigue Interactionmentioning

confidence: 99%

Fracture Behaviour of Aluminium Alloys under Coastal Environmental Conditions: A Review

Alqahtani,

Starr,

Khan

2024

Metals

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“…An environmental stress fracture is the general term in materials science used to refer to the premature failure of materials like metals, alloys [5], and composites due to tensile loads and environmental conditions. These fractures are induced by factors such as humid air, saltwater, and corrosive chemicals [6,7]. Many of these processes are also capable of affecting aluminium alloy and its composites [9,8].…”

Section: Introductionmentioning

confidence: 99%

Fracture Toughness Investigation of AL6082-T651 Alloy under Corrosive Environmental Conditions

Alqahtani,

Starr,

Khan

2024

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The crack initiation and propagation in an aluminium alloy in a corrosive environment are complex because of the loading parameters and material properties, which may result in a sudden failure in real-time applications. This paper investigates the fracture toughness of aluminium alloy under varying environmental and corrosion conditions. The main objective of the work is to link the interdependencies of humidity and temperature for an AL6082-T651 alloy in a corrosive environment. This study investigates AL6082-T651alloy's fracture behaviour and mechanism through microstructure and fractographic studies. The results show that a non-corroded sample, at room conditions, provided more load-carrying capacity than a corroded sample. Additionally, an increase in temperature improves fracture toughness, while an increase in humidity results in a decrease in fracture toughness.

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“…Under atmospheric corrosion conditions, the fatigue-corrosion cracking mechanism of Al alloys is usually initiated by the formation of corrosion pits or intergranular corrosion, which leads to local acidification and hydrogen production. Then both anodic dissolution and hydrogen embrittlement can take place, depending on the sensitivity of Al alloys and their precipitation state (distribution and composition of intermetallic particles) [30][31][32].…”

Section: Introductionmentioning

confidence: 99%

“…To take corrosion effects into account on the fatigue performance of metallic alloys, pre-corrosion under accelerated corrosion tests and testing in salt solutions or humid air are usually considered [22,31] and have been used for AM Al alloys [33][34][35]. There are other accelerated corrosion tests, such as VDA 233-102 tests (DIN 55635 [36]), that better mimic real outdoor exposure.…”

Section: Introductionmentioning

confidence: 99%

Corrosion-Fatigue Performance of 3D-Printed (L-PBF) AlSi10Mg

Linder,

Vucko,

et al. 2023

Materials

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Additive manufacturing (AM) allows for optimized part design, reducing weight compared to conventional manufacturing. However, the microstructure, surface state, distribution, and size of internal defects (e.g., porosities) are very closely related to the AM fabrication process and post-treatment operations. All these parameters can have a strong impact on the corrosion and fatigue performance of the final component. Thus, the fatigue-corrosion behavior of the 3D-printed (L-PBF) AlSi10Mg aluminum alloy has been investigated. The influence of load sequence (sequential vs. combined) was explored using Wöhler diagrams. Surface roughness and defects in AM materials were examined, and surface treatment was applied to improve surface quality. The machined specimens showed the highest fatigue properties regardless of load sequence by improving both the roughness and removing the contour layer containing the highest density of defect. The impact of corrosion was more pronounced for as-printed specimens as slightly deeper pits were formed, which lowered the fatigue-corrosion life. As discussed, the corrosion, fatigue and fatigue-corrosion mechanisms were strongly related to the local microstructure and existing defects in the AM sample.

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Fatigue Study of the Pre-Corroded 6082-T6 Aluminum Alloy in Saline Atmosphere

Cited by 10 publications

References 28 publications

Fracture Behaviour of Aluminium Alloys under Coastal Environmental Conditions: A Review

Fracture Behaviour of Aluminium Alloys under Coastal Environmental Conditions: A Review

Fracture Toughness Investigation of AL6082-T651 Alloy under Corrosive Environmental Conditions

Corrosion-Fatigue Performance of 3D-Printed (L-PBF) AlSi10Mg

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