Self-organization processes during deformation of nickel single crystals

Research output: Contribution to journalArticle

Abstract

In this work, plastic deformation of nickel single crystals with highly symmetric orientations was examined. Revealed scale levels of plastic deformation self-organization and the corresponding deformation mechanisms. It was established that the shear traces and meso-bands are formed due to dislocation glide, macro-bands are formed due to dislocation glide in and near-surface misorientation of local areas, and for folds the disorientation inside the crystal is additionally developed. Based on the morphology of folded structures, it is shown that there is a correlation between the wavelength of the folds, the distance between the misoriented bands and the dislocation substructure. The Hurst exponent and correlation lengths correlate with the stages of the stress-strain curve and, consequently, the type of dislocation substructure.

Original languageEnglish
Article number110007
JournalMaterials Characterization
Volume159
DOIs
Publication statusPublished - Jan 2020

Fingerprint

Nickel
Plastic deformation
Single crystals
nickel
single crystals
Stress-strain curves
substructures
Crystal orientation
plastic deformation
Macros
disorientation
Wavelength
Crystals
misalignment
exponents
shear
curves
wavelengths
crystals

Keywords

  • Deformation relief self-organization
  • FCC single crystal
  • Microstructure
  • Plastic deformation
  • Scaling

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

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title = "Self-organization processes during deformation of nickel single crystals",
abstract = "In this work, plastic deformation of nickel single crystals with highly symmetric orientations was examined. Revealed scale levels of plastic deformation self-organization and the corresponding deformation mechanisms. It was established that the shear traces and meso-bands are formed due to dislocation glide, macro-bands are formed due to dislocation glide in and near-surface misorientation of local areas, and for folds the disorientation inside the crystal is additionally developed. Based on the morphology of folded structures, it is shown that there is a correlation between the wavelength of the folds, the distance between the misoriented bands and the dislocation substructure. The Hurst exponent and correlation lengths correlate with the stages of the stress-strain curve and, consequently, the type of dislocation substructure.",
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AU - Andrey, Filippov

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N2 - In this work, plastic deformation of nickel single crystals with highly symmetric orientations was examined. Revealed scale levels of plastic deformation self-organization and the corresponding deformation mechanisms. It was established that the shear traces and meso-bands are formed due to dislocation glide, macro-bands are formed due to dislocation glide in and near-surface misorientation of local areas, and for folds the disorientation inside the crystal is additionally developed. Based on the morphology of folded structures, it is shown that there is a correlation between the wavelength of the folds, the distance between the misoriented bands and the dislocation substructure. The Hurst exponent and correlation lengths correlate with the stages of the stress-strain curve and, consequently, the type of dislocation substructure.

AB - In this work, plastic deformation of nickel single crystals with highly symmetric orientations was examined. Revealed scale levels of plastic deformation self-organization and the corresponding deformation mechanisms. It was established that the shear traces and meso-bands are formed due to dislocation glide, macro-bands are formed due to dislocation glide in and near-surface misorientation of local areas, and for folds the disorientation inside the crystal is additionally developed. Based on the morphology of folded structures, it is shown that there is a correlation between the wavelength of the folds, the distance between the misoriented bands and the dislocation substructure. The Hurst exponent and correlation lengths correlate with the stages of the stress-strain curve and, consequently, the type of dislocation substructure.

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KW - Plastic deformation

KW - Scaling

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