Abstract
A mechanism of crystal structure refinement in solids subjected to severe plastic deformation is proposed in the framework of a multiscale approach adopted in physical mesomechanics and nonequilibrium thermodynamics. The basis of the mechanism observed in nanostructuring of metallic materials is fragmentation of bent band structures comprising subbands of a base material and a defect one. As the crystal subbands are fragmented the subbands of the defect phase occupy the interfaces between the fragments. "Chessboard-like" distribution of normal and tangential tensile and compressive stresses at the interface between the base and defect material plays an important role in this process. A lower limit to initial crystal structure refinement for different severe plastic deformation techniques is examined.
Original language | English |
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Pages (from-to) | 203-212 |
Number of pages | 10 |
Journal | Physical Mesomechanics |
Volume | 11 |
Issue number | 5-6 |
DOIs | |
Publication status | Published - 1 Jan 2008 |
Keywords
- bulk nano structuring
- nonequilibrium thermodynamics
- physical mesomechanics
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Surfaces and Interfaces