Satellite intensity and forbidden reflections from stacking faults in a deformed superalloy
Miller JR, Cole HC, Hogg JM, Pitchforth J, Connor LD, Vacek P, Neumeier S, Church NL, Midgley PA, Collins DM, Rae CM, Stone HJ (2025)
Publication Type: Journal article
Publication year: 2025
Journal
Book Volume: 301
Article Number: 121542
DOI: 10.1016/j.actamat.2025.121542
Abstract
Single crystal Ni-base superalloys, like many materials containing an A1 structured phase, possess additional forbidden reflections in diffraction experiments. These additional reflections are most commonly attributed to the presence of chemical short-range order, or to thin foil effects in transmission electron microscopy. In this study, transmission electron diffraction and synchrotron X-ray diffraction were used to interrogate the deformation mechanics in a single crystal Ni-base superalloy at room temperature. Additional reflections were observed around those from the A1 phase in both diffraction experiments, arising from relrods along 〈111〉*. These relrods were linked to the formation of extensive intrinsic stacking faults (ISFs) within the A1 phase, giving rise to local disorder and a relaxation of the Bragg condition. This study represents the first use of single crystal X-ray diffraction to characterise forbidden reflections in A1 structures from bulk specimens, thereby discounting thin foil effects completely.
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APA:
Miller, J.R., Cole, H.C., Hogg, J.M., Pitchforth, J., Connor, L.D., Vacek, P.,... Stone, H.J. (2025). Satellite intensity and forbidden reflections from stacking faults in a deformed superalloy. Acta Materialia, 301. https://doi.org/10.1016/j.actamat.2025.121542
MLA:
Miller, J. R., et al. "Satellite intensity and forbidden reflections from stacking faults in a deformed superalloy." Acta Materialia 301 (2025).
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