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Published January 7, 2022 | Supplemental Material + Published
Journal Article Open

Dynamic Strength of Iron at High Pressures and Strain Rates

Abstract

Accurate modeling of meteorite impacts, and deformation of planetary cores require characterization of the flow strength and in-elasticity of iron in its different phases. In this Letter, we investigate the flow strength of both the ambient α phase and high-pressure ε phase of iron at strain rates of 1 × 10⁵ s⁻¹ and pressures up to 42 GPa using high-pressure–pressure shear plate impact experiments. We report the strength of the ε iron to be significantly higher than α phase but consequently one order smaller than the previously reported dynamic strength at high pressures. The complete stress-strain response of the ε phase is reported for the first time.

Additional Information

© 2022 American Physical Society. (Received 9 July 2021; revised 25 October 2021; accepted 17 December 2021; published 7 January 2022) The authors gratefully acknowledge the support of DOE/NNSA Award No. DE-NA0003957.

Attached Files

Published - PhysRevLett.128.015705.pdf

Supplemental Material - Iron_Strength_Paper_Supplementary_V4.pdf

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PhysRevLett.128.015705.pdf
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Additional details

Created:
August 22, 2023
Modified:
October 23, 2023