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Figure 4
Overlays of IPF (ND) maps and grain boundaries before and after thermal cycling, shown with different misorientation angle thresholds (1°, 3°, and 5°). Before thermal cycling, low-threshold (1°) maps reveal numerous small grains, while higher thresholds (3° and 5°) show the formation and merging of multiple grains. After thermal cycling, grain growth is observed at the 1° threshold, and grains become more rounded. At the 3° and 5° threshold, grain fragmentation and boundary rounding are shown.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 33| Part 3| May 2026| Pages 617-631
https://doi.org/10.1107/S1600577526001475
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