Coupled plastic flow and phase transformation under compression of materials in a diamond anvil cell: Effects of transformation kinetics and yield strength

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2012-01-31
Authors
Zarechnyy, Oleg
Levitas, Valery
Levitas, Valery
Ma, Yanzhang
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Aerospace Engineering
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Aerospace Engineering
Abstract

The large-strain problem on phase transformations (PTs) under compression in a diamond anvil cell is studied in detail using the finite-element method. The combined effect of transformation kinetics and ratios of the yield strengths of low- and high-pressure phases is examined. Some experimental phenomena (e.g., plateaus in pressure distribution and plasticflow to the center of a sample) are reproduced. Results are applied to interpretation of experimental data and characterization of strain-induced PTs.

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The following article appeared in Journal of Applied Physics 111 (2012): 023518 and may be found at http://dx.doi.org/10.1063/1.3677977.

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