ISIJ International
Online ISSN : 1347-5460
Print ISSN : 0915-1559
ISSN-L : 0915-1559
Higher Order Laue Zone Patterns in Convergent Beam Electron Diffraction and Determinations of Local Lattice Parameters in α- and α2-phases of a Cu-20at%Al Alloy
Tetsuya OkuyamaSyo MatsumuraYoshitsugu TomokiyoNoriyuki KuwanoKensuke Oki
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JOURNAL OPEN ACCESS

1989 Volume 29 Issue 3 Pages 191-197

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Abstract
In order to clarify the applicability of higher order Laue zone (HOLZ) patterns in convergent beam electron diffraction to the determinations of local lattice distortions in two-phase alloys, we discussed experimental conditions affecting the accuracy, and observed HOLZ patterns of a Cu-20at%Al alloy, in which small particles of α2-phase with one dimensional long period superstructure are precipitated in the matrix of fcc α-phase. It was shown that the accuracy is affected by specimen thickness as well as beam direction, and that lattice parameters along the [100] and [010] axes can be determined from a [114] HOLZ patterm with an error less than one part in a thousand. The [114] HOLZ patterns were obtained both from small regions in α-matrix and α2-particles. Slight changes in lattice parameters were detected as a function of position with a high spatial resolution.
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© The Iron and Steel Institute of Japan

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