Skip to main content

Orientation Imaging of the Microstructure of Polycrystalline Materials

  • Brent L. Adams (a1)

Recent developments, coupling the scanning electron microscope with image processing and crystallographic analysis, now make it possible to automatically index many thousands of lattice orientations exposed on section planes in polycrystalline materials. Backscattered Kikuchi diffraction patterns obtained from high-gain SIT and CCD cameras are analyzed using the Hough transformation (Cartesian coordinates - polar coordinates) in order to identify diffraction band widths and interplanar angles. From this basic information local lattice orientation can be determined. Information from raw data sets (in excess of 100,000 single orientations in some examples) can be used to construct orientation imaging micrographs which emphasize certain aspects of the exposed field of lattice orientations. Thus, features of the spatial placement of lattice orientation (including grain boundary misorientation, microtexture, and connectivity of the microstructure) are readily studied. In this paper these techniques are reviewed, and recent explorations of the connectivity of grain boundary misorientation structure are presented for an interesting nickel-chromium-iron alloy.

Hide All
1. Blackham, M. N., Alam, M. and Pashley, D. W., Proc. Roy. Soc. Lond. A221, 224 (1953).
2. Venables, J. A. and Harland, C. J., Phil. Mag. 27, 1193 (1973).
3. Dingley, D. J. and Baba-Kishi, K., Scanning Electron Microscopy 2, 383 (1986).
4. Juul-Jensen, D. and Schmidt, N.-H. in Recrystallization ‘90, edited by Chandra, T. (The Metallurgical Society, Warrendale, PA, 1991) p. 219.
5. Wright, S. I. and Adams, B. L., Metall. Trans. 24A, 759 (1992).
6. Lassen, N. C., Conradsen, K., and Juul-Jensen, D., Scanning Microscopy 6, 115 (1992).
7. Kunze, K., Wright, S. I., Adams, B. L. and Dingley, D. J. in Symposium on Microscale Textures of Materials, edited by Adams, B. L. and Weiland, H. (Textures and Microstructures 20, Gordon and Breach Publishers, Brussels, 1993) p. 41.
8. Hammermesh, M., Group Theory and its Application to Physical Problems, Addison Wesley Publishing Co., Reading, MA, 1962) p. 29.
9. Adams, B. L. and Field, D. P., Metall. Trans. 23A, 2501 (1992).
10. Gotthardt, R., Hoschek, G., Reimold, O. and Haessner, F., Texture 1, 99 (1972).
11. Adams, B. L., Wright, S. I. and Kunze, K., Metall. Trans. 24A, 819 (1993).
12. Brandon, D. G., Acta metall. 14, 1479 (1966).
Recommend this journal

Email your librarian or administrator to recommend adding this journal to your organisation's collection.

MRS Online Proceedings Library (OPL)
  • ISSN: -
  • EISSN: 1946-4274
  • URL: /core/journals/mrs-online-proceedings-library-archive
Please enter your name
Please enter a valid email address
Who would you like to send this to? *


Full text views

Total number of HTML views: 0
Total number of PDF views: 3 *
Loading metrics...

Abstract views

Total abstract views: 45 *
Loading metrics...

* Views captured on Cambridge Core between September 2016 - 22nd May 2018. This data will be updated every 24 hours.