Dynamic Strength of Iron at High Pressures and Strain Rates

Vatsa Gandhi, Suraj Ravindran, Guruswami Ravichandran

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

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.

Original languageEnglish (US)
Article number015705
JournalPhysical review letters
Volume128
Issue number1
DOIs
StatePublished - Jan 7 2022
Externally publishedYes

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© 2022 American Physical Society

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