X-ray diffraction study of phase transformation dynamics of Fe and Fe-Si alloys along the shock Hugoniot using an x-ray free electron laser - Archive ouverte HAL Access content directly
Journal Articles Physical Review B Year : 2022

X-ray diffraction study of phase transformation dynamics of Fe and Fe-Si alloys along the shock Hugoniot using an x-ray free electron laser

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Abstract

The x-ray free electron laser (XFEL) enables probing highly compressed material response at the subnanosecond timescale. We exploit the ultrafast XFEL pulse to combine reflection x-ray diffraction and laserdriven shock compression to perform a study of phase transformation and stability in iron and Fe-Si alloys. Our approach enables us to observe that solid-solid phase transformations occur in iron and Fe-Si8.5wt% in ≤130 ps at ∼130 GPa; no transformation is observed in Fe-Si16wt% up to 110 GPa. Density Functional Theory calculations predict similar phase relations.
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Dates and versions

hal-03827639 , version 1 (27-10-2022)

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A. Krygier, M. Harmand, B. Albertazzi, E. Mcbride, K. Miyanishi, et al.. X-ray diffraction study of phase transformation dynamics of Fe and Fe-Si alloys along the shock Hugoniot using an x-ray free electron laser. Physical Review B, 2022, 105 (22), pp.L220102. ⟨10.1103/PhysRevB.105.L220102⟩. ⟨hal-03827639⟩
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