Scale invariance of structural transformations in plastically deformed nanostructured solids
- 1 January 2017
- journal article
- Published by Pleiades Publishing Ltd in Physical Mesomechanics
- Vol. 20 (1), 55-68
- https://doi.org/10.1134/s1029959917010052
Abstract
The scale-invariant mechanical behavior of a nanostructured solid is associated with plastic distortion as a major mechanism of nano- and microscale structural transformations. Active grain boundary sliding in a deformed material (microscale) within its highly developed planar subsystem (nanograin boundaries) causes a progressive increase in lattice curvature and plastic distortion of atoms which produces nonequilibrium vacant sites in the nanostructure. The motion of nonequilibrium point defects in nanostructure curvature zones provides conditions for noncrystallographic plastic flow, dissolution or dispersion of initial phases, and formation of nonequilibrium phases in a deformed material. The possibility of reversible structural phase transformations in the presence of high lattice curvature opens the way to greatly increase the fatigue life of surface nanostructured polycrystalline materials.Keywords
This publication has 21 references indexed in Scilit:
- Plastic distortion as a fundamental mechanism in nonlinear mesomechanics of plastic deformation and fracturePhysical Mesomechanics, 2016
- Mechanisms of surface roughening of commercial purity titanium during ultrasonic impact treatmentMaterials Science and Engineering: A, 2015
- On localization and void coalescence as a precursor to ductile fracturePhilosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2015
- The influence of the surface on the fracture process of nanostructures under dynamic loadsComputational Materials Science, 2015
- Effect of structural states in near-surface layers of commercial titanium on its fatigue life and fatigue fracture mechanismsPhysical Mesomechanics, 2015
- Method of molecular dynamics in mechanics of deformable solidsJournal of Applied Mechanics and Technical Physics, 2014
- Two-dimensional spectroscopy of a molecular dimer unveils the effects of vibronic coupling on exciton coherencesNature Chemistry, 2014
- Molecular dynamics study of cluster structure and properties of rotational waves in solid nanostructuresAIP Conference Proceedings, 2014
- The role of curvature of the crystal structure in the formation of micropores and crack development under fatigue fracture of commercial titaniumDoklady Physics, 2013
- The influence of a nanocrystal size on the results of molecular-dynamics modelingComputational Materials Science, 2006