Fatigue crack growth behavior of 2624-T39 aluminum alloy with different grain sizes

Huang, Guan; Li, Zhihui; Sun, Li-Ming; Li, Xiwu; Wen, Kai; Yan, Lizhen; Xiong, Baiqing; Zhang, Yongan

doi:10.1007/s12598-020-01496-0

Cited by 11 publications

(2 citation statements)

References 29 publications

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“…The microstructure, including grain and the second phase, play an important role in the FCP of aluminum alloy. These factors may lead to different crack propagation models, such as crack deflection and bifurcation, thereby resulting in different FCGR [35,36]. In this study, the effect of the microstructure on the fatigue behavior of the alloy mainly lies on the influence of the grain boundary and coarse second phase on the FCP.…”

Section: Fatigue Propertiesmentioning

confidence: 96%

Effect of Microstructure on Mechanical Properties of 2519A Aluminum Alloy in Thickness Direction

Liu

Tang

et al. 2022

Metals

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2519A aluminum alloy thick plate is a promising structural material in the field of military industries, owing to its low density, high tensile strength and excellent ballistic performance. However, the nonuniformly distributed microstructure along the thickness direction of this alloy leads to delamination cracks, which restrict its further application in light armor fields. In order to understand the mechanism of delamination cracking along the thickness direction, the effect of the microstructure on the mechanical properties of 2519A aluminum alloy in the thickness direction was investigated. The results show that the elongation and critical stress intensity factor values (ΔKcr) of the alloy in the thickness direction are 45.8% and 44.1% lower than the values in the rolling direction, respectively. The low mechanical properties of the alloy may be due to the short distance between the second phase, the weak binding force of grain boundaries and the disharmonious deformation caused by the inhomogeneous distribution of the microstructure. This study provides a basis for improving the mechanical properties and delamination cracking of the alloy along the thickness direction.

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Section: Fatigue Propertiesmentioning

confidence: 96%

Effect of Microstructure on Mechanical Properties of 2519A Aluminum Alloy in Thickness Direction

Liu

Tang

et al. 2022

Metals

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“…A similar investigation on 2524 alloy raised a different result that grain refinement led to a decrease on FCP resistance within a micro-sized grain range from 0.8μm to 298μm. For grains with large size, Huang [15] proposed that no obvious difference was found for 2524 alloy with grain sizes of 241μm and 276μm. Hence, the influence of grain size seems to be in hang at present.…”

Section: Introductionmentioning

confidence: 99%

Grain Refinement Enhanced Tensile Strength, Fracture Toughness and Fatigue Crack Propagation Resistance of a High Zn-Containing Al-Zn-Mg-Cu Alloy

Lin¹,

Wen

et al. 2023

DDF

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In present work, a high Zn-containing Al-Zn-Mg-Cu alloy with different grain sizes was fabricated by extrusion and related precipitation characteristics and mechanical property were investigated after uniform heat treatments. The results showed that precipitation characteristics for the three alloys were almost the same. Matrix precipitates were GPII zone and η' phase and possessed small size and dense distribution while grain boundary precipitates exhibited discontinuous distribution. The rank of strength and fracture toughness for the three alloys are SG>MG>LG. Tearing ridges had been found on all the fracture surface while only LG alloy possess obvious dimple characteristics. The a-N curve showed that crack length list is MG>LG >SG under a same cycle number. The da/dN-ΔK curve also proved that fatigue crack propagation (FCP) rate of MG alloy is slightly larger than that of LG alloy, both were apparently larger than that of SG alloy. The width of fatigue striations on FCP fracture surface also backed it. Besides, obvious transgranular cracking characteristics and apparent secondary cracks were found on the FCP fracture surface.

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Interpretable Machine Learning Method for Modelling Fatigue Short Crack Growth Behaviour

Zhou,

Yang,

Xiao

et al. 2024

Met. Mater. Int.

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Fatigue crack growth behavior of 2624-T39 aluminum alloy with different grain sizes

Cited by 11 publications

References 29 publications

Effect of Microstructure on Mechanical Properties of 2519A Aluminum Alloy in Thickness Direction

Effect of Microstructure on Mechanical Properties of 2519A Aluminum Alloy in Thickness Direction

Grain Refinement Enhanced Tensile Strength, Fracture Toughness and Fatigue Crack Propagation Resistance of a High Zn-Containing Al-Zn-Mg-Cu Alloy

Interpretable Machine Learning Method for Modelling Fatigue Short Crack Growth Behaviour

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