Rough diamond anvils (rough-DA) are introduced to intensify all occurring processes during an in-situ study of heterogeneous compression of strongly pre-deformed Zr in diamond anvil cell (DAC). Crystallite size and dislocation density of Zr are getting pressure-, plastic strain tensor- and strain-path-independent during {\alpha}-{\omega} phase transformation (PT) and depend solely on the volume fraction of {\omega}-Zr. Rough-DA produce a steady nanostructure in {\alpha}-Zr with lower crystallite size and larger dislocation density than smooth-DA, leading to a two-time reduction in a minimum pressure for {\alpha}-{\omega} PT to a record value 0.67 GPa. The kinetics of strain-induced PT unexpectedly depends on time.
@article{arxiv.2305.15737,
title = {Rules of plastic strain-induced phase transformations and nanostructure evolution under high-pressure and severe plastic flow},
author = {Feng Lin and Valery Levitas and Krishan Pandey and Sorb Yesudhas and Changyong Park},
journal= {arXiv preprint arXiv:2305.15737},
year = {2023}
}
Comments
arXiv admin note: substantial text overlap with arXiv:2208.08022