Effect of grain structure on fatigue crack propagation behavior of Al-Cu-Li alloys

Lu, Ding-ding; Lin, Ben; Liu, Tianle; Deng, Shaozhi; Guo, Ya-Fang; Li, Jinfeng; Liu, Dan-yang

doi:10.1016/j.jmst.2022.10.085

Cited by 40 publications

(6 citation statements)

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“…The evolution of crack tip propagation area during plastic deformation plays a key role in understanding future service life. Therefore, future research will concentrate on identifying the root cause of stress corrosion mechanisms in corrosive materials through structural evolution [46][47][48]. The previous experiment shows that the strength and plasticity of aluminum alloy are the main factors influencing the fatigue crack propagation [46].…”

Section: Corrosion Widthmentioning

confidence: 99%

Section: Corrosion Widthmentioning

confidence: 99%

“…This local strengthening creates zones of plastic deformation within the material, leading to high strain gradient effects and localized strengthening. Therefore, it is crucial in the later stages of significant deformation to establish a clear understanding of the relationship between strain distribution, stress distribution, and the resulting microstructure [45][46][47]. This deep understanding is essential for gaining insight into the material's performance and longevity.…”

Section: Corrosion Widthmentioning

confidence: 99%

“…However, the accumulation of amorphous regions at the crack tip introduces a new issue by promoting stress concentration (Figure 9). This localized stress concentration can trigger crack nucleation within the amorphous zone, extending to form twin deformation zones and eventually spreading to other areas of the corroded sample surface [46][47][48]. This leads to significant local necking on the sample surface, causing a sharp decrease in the material's mechanical properties.…”

Section: Figure 9 Illustrates the Impact Of Corrosion Width On The Pr...mentioning

confidence: 99%

“…As the corrosion width increases, noticeable changes in the path of the strain-shear band expansion can be observed. It is important to consider that crystal materials have a symmetrical structure and loading conditions involve single uniaxial tension [46][47][48]. The shape of prefabricated cracks remains consistent.…”

Section: Figure 9 Illustrates the Impact Of Corrosion Width On The Pr...mentioning

confidence: 99%

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Revealing Crack Propagation and Mechanical Behavior of Corroded Aluminum Alloys

Zhang,

Wang,

Fang

et al. 2024

Symmetry

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The mechanical properties and crack propagation behavior of aluminum alloys, both with and without corroded surfaces, were thoroughly investigated through molecular dynamic (MD) simulations. The study delved into the effects of corrosion depth and width on the mechanical properties of corroded aluminum alloys. It was found that as the corrosion depth increases, the yield strength experiences an initial decrease followed by a subsequent increase. This can be attributed to the impact of increased corrosion depth on the healing of surface roughness, which ultimately leads to significant changes in yield strength. Furthermore, the presence of corrosion pits was identified as a key factor in regulating the local microstructure evolution within the material, leading to pronounced differences in stress distribution localization. This, in turn, influenced the path of crack propagation within the material. These findings not only contribute to a deeper understanding of the behavior of aluminum alloys under corrosion, but also provide valuable insights for the development of aluminum alloys with enhanced mechanical properties.

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