Ultrafast visualization of incipient plasticity in dynamically compressed matter

Mianzhen Mo (), Minxue Tang, Zhijiang Chen, J. Ryan Peterson, Xiaozhe Shen, John Kevin Baldwin, Mungo Frost, Mike Kozina, Alexander Reid, Yongqiang Wang, Juncheng E, Adrien Descamps, Benjamin K. Ofori-Okai, Renkai Li, Sheng-Nian Luo (), Xijie Wang () and Siegfried Glenzer ()
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Mianzhen Mo: SLAC National Accelerator Laboratory
Minxue Tang: Southwest Jiaotong University
Zhijiang Chen: SLAC National Accelerator Laboratory
J. Ryan Peterson: SLAC National Accelerator Laboratory
Xiaozhe Shen: SLAC National Accelerator Laboratory
John Kevin Baldwin: Los Alamos National Laboratory
Mungo Frost: SLAC National Accelerator Laboratory
Mike Kozina: SLAC National Accelerator Laboratory
Alexander Reid: SLAC National Accelerator Laboratory
Yongqiang Wang: Los Alamos National Laboratory
Juncheng E: European XFEL GmbH
Adrien Descamps: SLAC National Accelerator Laboratory
Benjamin K. Ofori-Okai: SLAC National Accelerator Laboratory
Renkai Li: SLAC National Accelerator Laboratory
Sheng-Nian Luo: Southwest Jiaotong University
Xijie Wang: SLAC National Accelerator Laboratory
Siegfried Glenzer: SLAC National Accelerator Laboratory

Nature Communications, 2022, vol. 13, issue 1, 1-8

Abstract: 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.

Date: 2022
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DOI: 10.1038/s41467-022-28684-z

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