Characterizing dislocation loops in irradiated polycrystalline Zr alloys by X-ray line profile analysis of powder diffraction patterns with satellites

Ungár, T.; Ribárik, G.; Topping, M.; Jones, R.M.A.; Dan Xu, X.; Hulse, R.; Harte, A.; Tichy, G.; Race, C.P.; Frankel, P.; Preuss, M.

doi:10.1107/S1600576721002673

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Figure 4
(a) The peak profile of the (11.0) reflection of a Zircaloy-2 specimen neutron-irradiated to a fluence of 13.1 × 10²⁵ n m⁻² on a logarithmic intensity scale. (b) The peak profile of the (10.3) reflection of a Zircaloy-2 specimen proton-irradiated to a level of 4.7 dpa at 350°C on a logarithmic intensity scale. The logarithmic intensity scale is used in order to visualize the satellite peaks in the low-intensity regions of the profiles. (c) Redrawn from Fig. 40.18(b) of Krivoglaz (1996

), where I₀ denotes the peak of the undistorted perfect crystal, exp(−2M) is the Debye–Waller factor, C is the strength of the defects and I₁ is the defect-affected intensity. Note that the satellites in panels (a) and (b) are related to vacancy-type loops, whereas the `hump' in panel (c) corresponds to interstitial-type defects.

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ISSN: 1600-5767

Volume 54| Part 3| June 2021| Pages 803-821

https://doi.org/10.1107/S1600576721002673

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