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Tensorial stress-plastic strain fields in α - ω Zr mixture, transformation kinetics, and friction in diamond-anvil cell

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  • Valery I. Levitas

    (Iowa State University
    Iowa State University
    Division of Materials Science and Engineering)

  • Achyut Dhar

    (Iowa State University)

  • K. K. Pandey

    (Bhabha Atomic Research Centre, Bombay)

Abstract

Various phenomena (phase transformations (PTs), chemical reactions, microstructure evolution, strength, and friction) under high pressures in diamond-anvil cell are strongly affected by fields of stress and plastic strain tensors. However, they could not be measured. Here, we suggest coupled experimental-analytical-computational approaches utilizing synchrotron X-ray diffraction, to solve an inverse problem and find fields of all components of stress and plastic strain tensors and friction rules before, during, and after α-ω PT in strongly plastically predeformed Zr. Results are in good correspondence with each other and experiments. Due to advanced characterization, the minimum pressure for the strain-induced α-ω PT is changed from 1.36 to 2.7 GPa. It is independent of the plastic strain before PT and compression-shear path. The theoretically predicted plastic strain-controlled kinetic equation is verified and quantified. Obtained results open opportunities for developing quantitative high-pressure/stress science, including mechanochemistry, synthesis of new nanostructured materials, geophysics, astrogeology, and tribology.

Suggested Citation

  • Valery I. Levitas & Achyut Dhar & K. K. Pandey, 2023. "Tensorial stress-plastic strain fields in α - ω Zr mixture, transformation kinetics, and friction in diamond-anvil cell," Nature Communications, Nature, vol. 14(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-41680-1
    DOI: 10.1038/s41467-023-41680-1
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    5. Agnès Dewaele & Paul Loubeyre & Florent Occelli & Olivier Marie & Mohamed Mezouar, 2018. "Toroidal diamond anvil cell for detailed measurements under extreme static pressures," Nature Communications, Nature, vol. 9(1), pages 1-9, December.
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