Effect of Alternate Corrosion and Fatigue on Fatigue Crack Growth Characterization of 2024-T4 Aluminum Alloy

Zhang, Tianyu; He, Yuting; Li, Changfan; Zhang, Teng; Zhang, Sheng

doi:10.1155/2020/7314241

Cited by 8 publications

(8 citation statements)

References 41 publications

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“…In general, the results show that, regardless of the environment, the fatigue crack growth rates are quite similar for both aluminium alloys. On the other hand, it is noticeable that the crack growth rates in specimens of base material (without corrosion) are of magnitude 10 −5 to 10 −3 mm/cycle, while in corroded specimens crack growth rates are mostly of magnitude 10 −4 mm/cycle [10]. Finally, a significant degradation effect of corrosion was observed in the specimens of both aluminium alloys.…”

Section: Fatigue Crack Growth Ratementioning

confidence: 91%

Influence of Corrosion on Parameters of Fracture Mechanics of Aluminium Alloys 2024-T351 and 7075-T651

Petrović¹,

Grbović

Burzić

et al. 2022

Teh. vjesn.

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This paper presents the results of determining the fatigue crack growth parameters in aluminium alloy specimens 2024-T351 and 7075-T651, with different levels of previous corrosion, in the laboratory environment. Tests were performed, under the same load conditions, for each case of corrosion (without corrosion, 7 days of exposure in a corrosive environment and 30 days of exposure in a corrosive environment). All the tests were performed at room temperature. The analysis of the results includes changes in the basic parameters of fatigue crack growth, depending on the time of exposure to the action of controlled moisture. In addition, this paper gives a brief overview of modern design processes in the environment of computer mechanics and presents the results of the crack growth simulation, using the software package ANSYS.

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Section: Fatigue Crack Growth Ratementioning

confidence: 91%

Influence of Corrosion on Parameters of Fracture Mechanics of Aluminium Alloys 2024-T351 and 7075-T651

Petrović¹,

Grbović

Burzić

et al. 2022

Teh. vjesn.

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“…Daniel Kovalov et al [185] studied the corrosion fatigue of aluminium alloy 2024-T351 and found the effects of electrochemical potential, NaCl concentration, loading frequency, and temperature. Zhang T et al [186] developed a model considering the corrosion and fatigue cycle effects of aluminium alloy 2024-T4. They used curve fitting techniques to relate the corrosion time and depth of aluminium alloys.…”

Section: Modelling and Predictive Approachesmentioning

confidence: 99%

“…Although various models [185,186,191] are used to analyse the obtained data and predict the life cycle in non-corrosive and corrosive conditions, the current understanding still needs to consider the specific effects of temperature and humidity. Investigating how temperature and humidity interact to affect fracture toughness and FCGR behaviour is critical to ensure aluminium alloy components' reliable and safe performance in coastal environments.…”

Section: Modelling and Predictive Approachesmentioning

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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“…Danyil Kovalov et al [21] explored corrosion fatigue in aluminium alloy 2024-T351, finding influence from electrochemical potential, NaCl concentration, loading frequency, and temperature. Tianyu Zhang et al [22] developed a model accounting for corrosion and fatigue alternation effects on 2024-T4 aluminium alloy.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Combined Influence of Temperature and Humidity on Fatigue Crack Growth Rate in Al6082 Alloy in a Coastal Environment

Alqahtani,

Starr,

Khan

2023

Materials

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The fatigue crack growth rate (FCGR) of aluminium alloys under the combined influence of temperature and humidity remains a relatively unexplored area, receiving limited attention due to its intricate nature and challenges in predicting the combined impact of these factors. The challenge was to investigate and address the specific mechanisms and interactions between temperature and humidity, as in coastal environment conditions, on the FCGR of aluminium alloy. The present study conducts a comprehensive investigation into the combined influence of temperature and humidity on the FCGR of the Al6082 alloy. The fatigue pre-cracked compact tension specimens were corroded for 7 days and then subjected to various temperature and humidity conditions in a thermal chamber for 3 days to simulate coastal environments. The obtained data were analysed to determine the influence of temperature and humidity on the FCGR of the Al6082 alloy. An empirical model was also established to precisely predict fatigue life cycle values under these environmental conditions. The correlation between FCGR and fracture toughness models was also examined. The Al6082 alloy exhibits a 34% increase in the Paris constant C, indicating reduced FCGR resistance due to elevated temperature and humidity levels. At the same time, fatigue, corrosion, moisture-assisted crack propagation, and hydrogen embrittlement lead to a 27% decrease in threshold fracture toughness. The developed model exhibited accurate predictions for fatigue life cycles, and the correlation between fracture toughness and FCGR showed an error of less than 10%, indicating a strong relationship between these parameters.

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Effect of Alternate Corrosion and Fatigue on Fatigue Crack Growth Characterization of 2024-T4 Aluminum Alloy

Cited by 8 publications

References 41 publications

Influence of Corrosion on Parameters of Fracture Mechanics of Aluminium Alloys 2024-T351 and 7075-T651

Influence of Corrosion on Parameters of Fracture Mechanics of Aluminium Alloys 2024-T351 and 7075-T651

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

Investigation of the Combined Influence of Temperature and Humidity on Fatigue Crack Growth Rate in Al6082 Alloy in a Coastal Environment

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