Fatigue Crack Propagation Behavior of the 2195-T8 Aluminum-Lithium Alloy with a Precorroded Hole
This work investigated the fatigue crack propagation behavior of the 2195-T8 Al-Li alloy with precorroded holes. The microstructure, crack growth path, and the fracture surfaces of the samples with the precorroded holes have been examined with scanning electron microscopy (SEM), electron backscatter...
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| Format: | Article |
| Language: | English |
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Wiley
2022-01-01
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| Series: | International Journal of Aerospace Engineering |
| Online Access: | http://dx.doi.org/10.1155/2022/4941089 |
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| _version_ | 1832551692949782528 |
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| author | Dejun Liu Gan Tian Yulong Li Guofeng Jin Wei Zhang |
| author_facet | Dejun Liu Gan Tian Yulong Li Guofeng Jin Wei Zhang |
| author_sort | Dejun Liu |
| collection | DOAJ |
| description | This work investigated the fatigue crack propagation behavior of the 2195-T8 Al-Li alloy with precorroded holes. The microstructure, crack growth path, and the fracture surfaces of the samples with the precorroded holes have been examined with scanning electron microscopy (SEM), electron backscatter diffraction (EBSD), and computed tomography (CT). The characteristics of the crack growth have been analyzed via fracture mechanics by employing the finite element method (FEM). The results showed that the bulk of the fatigue cracks had been initiated from the corrosion pits and corroded discontinuously and precipitated further to become intergranular. Owing to the superposed stress concentration caused by the corrosion pits, the porous region at the bottom of the precorroded hole had affected the crack propagation performance. Crack growth rates were different in multiple positions owing to the difference of KI at crack fronts. |
| format | Article |
| id | doaj-art-a38fea4a36954769bca755b893ee99f7 |
| institution | Kabale University |
| issn | 1687-5974 |
| language | English |
| publishDate | 2022-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Aerospace Engineering |
| spelling | doaj-art-a38fea4a36954769bca755b893ee99f72025-02-03T06:00:56ZengWileyInternational Journal of Aerospace Engineering1687-59742022-01-01202210.1155/2022/4941089Fatigue Crack Propagation Behavior of the 2195-T8 Aluminum-Lithium Alloy with a Precorroded HoleDejun Liu0Gan Tian1Yulong Li2Guofeng Jin3Wei Zhang4School of Missile EngineeringSchool of Missile EngineeringBeijing Institute of Space Launch TechnologySchool of Missile EngineeringSchool of Missile EngineeringThis work investigated the fatigue crack propagation behavior of the 2195-T8 Al-Li alloy with precorroded holes. The microstructure, crack growth path, and the fracture surfaces of the samples with the precorroded holes have been examined with scanning electron microscopy (SEM), electron backscatter diffraction (EBSD), and computed tomography (CT). The characteristics of the crack growth have been analyzed via fracture mechanics by employing the finite element method (FEM). The results showed that the bulk of the fatigue cracks had been initiated from the corrosion pits and corroded discontinuously and precipitated further to become intergranular. Owing to the superposed stress concentration caused by the corrosion pits, the porous region at the bottom of the precorroded hole had affected the crack propagation performance. Crack growth rates were different in multiple positions owing to the difference of KI at crack fronts.http://dx.doi.org/10.1155/2022/4941089 |
| spellingShingle | Dejun Liu Gan Tian Yulong Li Guofeng Jin Wei Zhang Fatigue Crack Propagation Behavior of the 2195-T8 Aluminum-Lithium Alloy with a Precorroded Hole International Journal of Aerospace Engineering |
| title | Fatigue Crack Propagation Behavior of the 2195-T8 Aluminum-Lithium Alloy with a Precorroded Hole |
| title_full | Fatigue Crack Propagation Behavior of the 2195-T8 Aluminum-Lithium Alloy with a Precorroded Hole |
| title_fullStr | Fatigue Crack Propagation Behavior of the 2195-T8 Aluminum-Lithium Alloy with a Precorroded Hole |
| title_full_unstemmed | Fatigue Crack Propagation Behavior of the 2195-T8 Aluminum-Lithium Alloy with a Precorroded Hole |
| title_short | Fatigue Crack Propagation Behavior of the 2195-T8 Aluminum-Lithium Alloy with a Precorroded Hole |
| title_sort | fatigue crack propagation behavior of the 2195 t8 aluminum lithium alloy with a precorroded hole |
| url | http://dx.doi.org/10.1155/2022/4941089 |
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