On the production of randomly-oriented recrystallization nuclei for selective growth experiments

Nave, Mark, Verbeken, Kim and Kestens, Leo 2004, On the production of randomly-oriented recrystallization nuclei for selective growth experiments, Materials science forum, vol. 467, no. 470, pp. 165-170.

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Title On the production of randomly-oriented recrystallization nuclei for selective growth experiments
Author(s) Nave, Mark
Verbeken, Kim
Kestens, Leo
Journal name Materials science forum
Volume number 467
Issue number 470
Start page 165
End page 170
Publisher Trans Tech Publications
Place of publication Zurich, Switzerland
Publication date 2004
ISSN 0255-5476
Keyword(s) recrystallization
random nucleation
selective growth
Summary The ideal starting condition for selective growth experiments is one having a layer of randomly-oriented nuclei adjacent to a matrix with negligible orientational variation but sufficient stored energy to promote growth. In practice, cutting or deformation processes are used in an attempt to approximate these ideal conditions, but the degree to which this is achieved has not been rigorously quantified. In this work, Fe-3wt%Si single crystals were cut or deformed using six different processes. The variation in texture with distance from the cut or deformed surface was measured using electron backscatter diffraction (EBSD) in a field emission gun scanning electron microscope (FEG-SEM) in order to assess the ability of each process to create conditions suitable for selective growth experiments. While grooving with a machine tool produced the best spread of orientations at the cut surface, the suitability of this process is diminished by the presence of a differently-textured deformed layer between the cut surface and the single crystal matrix. Grinding produced a less ideal distribution of orientations at the cut surface, but the presence of these orientations in a very thin layer adjacent to the matrix makes this process preferable for preparing crystals for selective growth experiments, provided the results are corrected for the deviation in the distribution of nuclei orientations from a random distribution.
Language eng
Field of Research 091207 Metals and Alloy Materials
HERDC Research category C1 Refereed article in a scholarly journal
Persistent URL http://hdl.handle.net/10536/DRO/DU:30002416

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