Characterisation of dislocation types in a plastically deformed aluminium base alloy

E. Schafler, Ch Sitkovitch, I. Dragomir, A. Révész, M. Zehetbauer, T. Ungár

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Dislocation character in plastic deformation is still subject of research. X-ray line broadening can be used to determine dislocation character experimentally. The strain part of line broadening is generally anisotropic. This means that neither the FWHM in the Williamson-Hall plot nor the Fourier coefficients in the Warren-Averbach analysis are a smooth function of the diffraction vector g. On the basis of the dislocation model the modified Williamson-Hall and Warren-Averbach procedures have been suggested where g and g2 are replaced by g√C̄ and g2C̄, where C̄ is the average dislocation contrast factor. C̄ can be evaluated for different crystal systems and different dislocation types, i.e. edge and/or screw, by numerical methods taking into account the elastic constants of the material. On the other hand, by analysing strain anisotropy the character of dislocations present in the crystal can also be determined.

Original languageEnglish
Pages (from-to)92-96
Number of pages5
JournalMaterials Science Forum
Volume321-324 I
Publication statusPublished - 2000

Fingerprint

Aluminum
Dislocations (crystals)
aluminum
Crystals
Elastic constants
Full width at half maximum
Plastic deformation
Numerical methods
Anisotropy
Diffraction
X rays
screws
plastic deformation
crystals
elastic properties
plots
anisotropy
coefficients
diffraction
x rays

Keywords

  • Dislocation Character
  • Dislocation Model
  • Plastic Deformation
  • Strain Anisotropy

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Characterisation of dislocation types in a plastically deformed aluminium base alloy. / Schafler, E.; Sitkovitch, Ch; Dragomir, I.; Révész, A.; Zehetbauer, M.; Ungár, T.

In: Materials Science Forum, Vol. 321-324 I, 2000, p. 92-96.

Research output: Contribution to journalArticle

Schafler, E, Sitkovitch, C, Dragomir, I, Révész, A, Zehetbauer, M & Ungár, T 2000, 'Characterisation of dislocation types in a plastically deformed aluminium base alloy', Materials Science Forum, vol. 321-324 I, pp. 92-96.
Schafler, E. ; Sitkovitch, Ch ; Dragomir, I. ; Révész, A. ; Zehetbauer, M. ; Ungár, T. / Characterisation of dislocation types in a plastically deformed aluminium base alloy. In: Materials Science Forum. 2000 ; Vol. 321-324 I. pp. 92-96.
@article{1699bbc6cc914ac29c7970f87fe390fa,
title = "Characterisation of dislocation types in a plastically deformed aluminium base alloy",
abstract = "Dislocation character in plastic deformation is still subject of research. X-ray line broadening can be used to determine dislocation character experimentally. The strain part of line broadening is generally anisotropic. This means that neither the FWHM in the Williamson-Hall plot nor the Fourier coefficients in the Warren-Averbach analysis are a smooth function of the diffraction vector g. On the basis of the dislocation model the modified Williamson-Hall and Warren-Averbach procedures have been suggested where g and g2 are replaced by g√C̄ and g2C̄, where C̄ is the average dislocation contrast factor. C̄ can be evaluated for different crystal systems and different dislocation types, i.e. edge and/or screw, by numerical methods taking into account the elastic constants of the material. On the other hand, by analysing strain anisotropy the character of dislocations present in the crystal can also be determined.",
keywords = "Dislocation Character, Dislocation Model, Plastic Deformation, Strain Anisotropy",
author = "E. Schafler and Ch Sitkovitch and I. Dragomir and A. R{\'e}v{\'e}sz and M. Zehetbauer and T. Ung{\'a}r",
year = "2000",
language = "English",
volume = "321-324 I",
pages = "92--96",
journal = "Materials Science Forum",
issn = "0255-5476",
publisher = "Trans Tech Publications",

}

TY - JOUR

T1 - Characterisation of dislocation types in a plastically deformed aluminium base alloy

AU - Schafler, E.

AU - Sitkovitch, Ch

AU - Dragomir, I.

AU - Révész, A.

AU - Zehetbauer, M.

AU - Ungár, T.

PY - 2000

Y1 - 2000

N2 - Dislocation character in plastic deformation is still subject of research. X-ray line broadening can be used to determine dislocation character experimentally. The strain part of line broadening is generally anisotropic. This means that neither the FWHM in the Williamson-Hall plot nor the Fourier coefficients in the Warren-Averbach analysis are a smooth function of the diffraction vector g. On the basis of the dislocation model the modified Williamson-Hall and Warren-Averbach procedures have been suggested where g and g2 are replaced by g√C̄ and g2C̄, where C̄ is the average dislocation contrast factor. C̄ can be evaluated for different crystal systems and different dislocation types, i.e. edge and/or screw, by numerical methods taking into account the elastic constants of the material. On the other hand, by analysing strain anisotropy the character of dislocations present in the crystal can also be determined.

AB - Dislocation character in plastic deformation is still subject of research. X-ray line broadening can be used to determine dislocation character experimentally. The strain part of line broadening is generally anisotropic. This means that neither the FWHM in the Williamson-Hall plot nor the Fourier coefficients in the Warren-Averbach analysis are a smooth function of the diffraction vector g. On the basis of the dislocation model the modified Williamson-Hall and Warren-Averbach procedures have been suggested where g and g2 are replaced by g√C̄ and g2C̄, where C̄ is the average dislocation contrast factor. C̄ can be evaluated for different crystal systems and different dislocation types, i.e. edge and/or screw, by numerical methods taking into account the elastic constants of the material. On the other hand, by analysing strain anisotropy the character of dislocations present in the crystal can also be determined.

KW - Dislocation Character

KW - Dislocation Model

KW - Plastic Deformation

KW - Strain Anisotropy

UR - http://www.scopus.com/inward/record.url?scp=33749208130&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33749208130&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:33749208130

VL - 321-324 I

SP - 92

EP - 96

JO - Materials Science Forum

JF - Materials Science Forum

SN - 0255-5476

ER -