TY - JOUR
T1 - Dynamic Strength of Iron at High Pressures and Strain Rates
AU - Gandhi, Vatsa
AU - Ravindran, Suraj
AU - Ravichandran, Guruswami
N1 - Publisher Copyright:
© 2022 American Physical Society
PY - 2022/1/7
Y1 - 2022/1/7
N2 - 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.
AB - 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.
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U2 - 10.1103/PhysRevLett.128.015705
DO - 10.1103/PhysRevLett.128.015705
M3 - Article
C2 - 35061488
AN - SCOPUS:85122892425
SN - 0031-9007
VL - 128
JO - Physical review letters
JF - Physical review letters
IS - 1
M1 - 015705
ER -