Paper Title:
Determinability of Complete Residual Strain Tensor from Multiple CBED Patterns
  Abstract

The ambiguity in determination of complete elastic strain tensor by convergent beam electron diffraction can be overcome by simultaneous use of multiple diffraction patterns. Numerical tests of strain determining procedure based on multiple patterns have been carried out. Patterns were simulated using both kinematic and dynamic approaches, and then they were used as input in the tested procedure. The tests indicate that, in practice, at least three patterns are needed in order to determine a complete strain tensor with reasonable accuracy. The strain resolution of two parts per ten thousand was achieved with five diffraction patterns. Moreover, the impact of errors in voltage and camera length is considered. It is shown that within the kinematic description, the deviations from the correct voltage are equivalent to errors in the isotropic part of strain.

  Info
Periodical
Materials Science Forum (Volumes 524-525)
Edited by
W. Reimers and S. Quander
Pages
115-120
DOI
10.4028/www.scientific.net/MSF.524-525.115
Citation
A. Morawiec, "Determinability of Complete Residual Strain Tensor from Multiple CBED Patterns ", Materials Science Forum, Vols. 524-525, pp. 115-120, 2006
Online since
September 2006
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Price
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