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- Title
Ultrafast visualization of incipient plasticity in dynamically compressed matter.
- Authors
Mo, Mianzhen; Tang, Minxue; Chen, Zhijiang; Peterson, J. Ryan; Shen, Xiaozhe; Baldwin, John Kevin; Frost, Mungo; Kozina, Mike; Reid, Alexander; Wang, Yongqiang; E, Juncheng; Descamps, Adrien; Ofori-Okai, Benjamin K.; Li, Renkai; Luo, Sheng-Nian; Wang, Xijie; Glenzer, Siegfried
- Abstract
Plasticity is ubiquitous and plays a critical role in material deformation and damage; it inherently involves the atomistic length scale and picosecond time scale. A fundamental understanding of the elastic-plastic deformation transition, in particular, incipient plasticity, has been a grand challenge in high-pressure and high-strain-rate environments, impeded largely by experimental limitations on spatial and temporal resolution. Here, we report femtosecond MeV electron diffraction measurements visualizing the three-dimensional (3D) response of single-crystal aluminum to the ultrafast laser-induced compression. We capture lattice transitioning from a purely elastic to a plastically relaxed state within 5 ps, after reaching an elastic limit of ~25 GPa. Our results allow the direct determination of dislocation nucleation and transport that constitute the underlying defect kinetics of incipient plasticity. Large-scale molecular dynamics simulations show good agreement with the experiment and provide an atomic-level description of the dislocation-mediated plasticity. Understanding incipient plasticity has been experimentally limited by spatial and temporal resolution. Here the authors report ultra-fast, in situ electron diffraction measurement of dislocation defect dynamics in the early stage of plastic deformation in Al under laser-driven compression.
- Subjects
DISLOCATION nucleation; MATERIAL plasticity; YIELD strength (Engineering); MOLECULAR dynamics; ELECTRON diffraction
- Publication
Nature Communications, 2022, Vol 13, Issue 1, p1
- ISSN
2041-1723
- Publication type
Article
- DOI
10.1038/s41467-022-28684-z