EGU21-13568, updated on 04 Mar 2021
EGU General Assembly 2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Crystal plasticity in shock-compressed hcp-iron

Sébastien Merkel1, Sovanndara Hok2, Cynthia Bolme3, Wendy Mao2, and Arianna Gleason3,4
Sébastien Merkel et al.
  • 1Université de Lille, UMET, Lille, France (
  • 2Stanford University, Stanford, CA, United States
  • 3Los Alamos National Laboratory, Los Alamos, NM, United States
  • 4SLAC National Accelerator Laboratory, Menlo Park, CA, United States

Iron is a key constituent of planetary core and an important technological material. Here, we combine in situ ultrafast X-ray diffraction at free electron lasers with optical-laser-induced shock compression experiments on polycrystalline Fe to study the plasticity of hexagonal close-packed (hcp)-Fe under extreme loading states. We identifiy the deformation mechanisms that controls the Fe microstructures and  observe a significant time-evolution of stress over the few nanoseconds of the experiments. These observations illustrate how ultrafast plasticity studies can reveal distinctive materials behavior under extreme loading states and will help constraining the pressure, temperature, and strain rate dependence of materials behavior in planetary cores.

How to cite: Merkel, S., Hok, S., Bolme, C., Mao, W., and Gleason, A.: Crystal plasticity in shock-compressed hcp-iron, EGU General Assembly 2021, online, 19–30 Apr 2021, EGU21-13568,, 2021.

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