Stable Stacking Faults Bounded by Frank Partial Dislocations in Al7075 Formed through Precipitate and Dislocation Interactions
Source abstract
Abstract
Through high-resolution electron microscopy, stacking faults (SFs) due to Frank partial dislocations were found in an aluminum alloy following deformation with low strain and strain rate, while also remaining stable during artificial aging. Extrinsic stacking faults were found surrounded by dislocation areas and precipitates. An intrinsic stacking fault was found between two Guinier-Preston II (GP II) zones when the distance of the two GP II zones was 2 nm. Defects (precipitates and dislocations) are considered to have an influence on the formation of the SFs, as their appearance may cause local strain and promote the gathering of vacancies to lower the energy.
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Research context
OpenAlex topics: Aluminum Alloy Microstructure Properties · Microstructure and mechanical properties · Aluminum Alloys Composites Properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Key Laboratory of Aerospace Materials and Performance (Ministry of Education), School of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China
The Collaborative Innovation Center for Advanced Aero-Engine (CICAAE), Beijing University of Aeronautics and Astronautics, Beijing 100191, China
Beijing Key Laboratory of Advanced Nuclear Materials and Physics, Beijing University of Aeronautics and Astronautics, Beijing 100191, China
References (18)
Show source-provided references
1. Deformation twins in nanocrystalline Al10.1063/1.1633975 ↗
2. Deformation twinning in nanocrystalline Al by molecular dynamics simulation10.1016/S1359-6454(02)00318-X ↗
3. Formation of incoherent deformation twin boundaries in a coarse-grained Al-7Mg alloy10.1063/1.4929683 ↗
4. Ultra-high-strain-rate shearing and deformation twinning in nanocrystalline aluminum10.1007/s11012-014-9952-7 ↗
5. Reversible Twinning in Pure Aluminum10.1103/PhysRevLett.102.205504 ↗
6. Deformation induced microtwins and stacking faults in aluminum single crystal10.1103/PhysRevLett.101.115505 ↗
7. Zhao, F., Wang, L., Fan, D., Bie, B.X., Zhou, X.M., Suo, T., Li, Y.L., Chen, M.W., Liu, C.L., and Qi, M.L. (2016). Macrodeformation Twins in Single-Crystal Aluminum. Phys. Rev. Lett., 116.10.1103/PhysRevLett.116.075501 ↗
8. Atomic-scale in situ observation of lattice dislocations passing through twin boundaries10.1063/1.3072801 ↗
9. Deformation mechanism in nanocrystalline Al: Partial dislocation slip10.1063/1.1594836 ↗
10. Vacancy clusters in ultrafine grained Al by severe plastic deformation10.1063/1.2794416 ↗
11. Unstable stacking faults in submicron/micron Al grammins in multi-SiCp/multi-Al nanocomposite10.1016/j.vacuum.2015.09.002 ↗
12. New insights into radiation hardening in face-centered cubic alloys10.1016/j.scriptamat.2014.12.003 ↗
13. Zheng, Y., Luo, B., Bai, Z., Wang, J., and Yin, Y. (2017). Study of the Precipitation Hardening Behaviour and Intergranular Corrosion of Al-Mg-Si Alloys with Differing Si Contents. Metals, 7.10.3390/met7100387 ↗
14. Precipitation phenomena in an ultrafine-grained Al alloy10.1016/j.actamat.2012.12.037 ↗
15. GP-zones in Al-Zn-Mg alloys and their role in artificial aging10.1016/S1359-6454(01)00251-8 ↗
16. Improving the ductility of nanostructured Al alloy using strongly textured nano-laminated structure combined with nano-precipitates10.1016/j.msea.2016.08.072 ↗
17. Early-stage precipitation in Al-Zn-Mg-Cu alloy (7050)10.1016/j.actamat.2004.06.025 ↗
18. Precipitation hardening10.1016/0079-6425(63)90010-0 ↗