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Figure 4
(a)–(c) SEM images of three different nitrided whiskers and the corresponding mean orientation of the residual iron indicated in a stereographic projection. All whiskers exhibit [{({001} )_{{\alpha}}}] surfaces. The orange lines mark the plane traces of the habit planes predicted for the particular variant. The growth axis and the possible facets are marked by red circles. (d)–(f) Superposition of the band contrast maps with the IPF maps of the nitrided iron whiskers corresponding to (a)–(c). The α–γ′ interface is marked with a blue line, if the deviation from the PTMC OR is ≤2°. The numbers denote the identified PTMC variants (see Fig. 2[link]). The yellow line in (f) marks the Σ3 twin boundary between two γ′ variants, if the deviation is also ≤2°.

Journal logoJOURNAL OF
APPLIED
CRYSTALLOGRAPHY
ISSN: 1600-5767
Volume 53| Part 4| August 2020| Pages 865-879
https://doi.org/10.1107/S1600576720005981
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