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Figure 5
Temperature-dependent evolution of the Guinier–Porod radius Rg derived from a parabolic grain growth model. The experimental data points (black squares) were estimated from lamellar widths measured via TEM using the approximation [R_{\rm g} \simeq \lambda /\sqrt {12}]. For each condition, ∼50–100 individual lamellae were evaluated to determine representative mean widths. The fitted curve represents the applied coarsening model used to describe the evolving background scattering in the Guinier–Porod function. The grey-shaded region indicates the temperature from which the precipitation reaction is almost completed [Fig. 1(d)] and the α → β transformation becomes increasingly pronounced, leading to significant changes in the matrix characteristics.

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APPLIED
CRYSTALLOGRAPHY
ISSN: 1600-5767
Volume 58| Part 6| December 2025| Pages 2006-2017
https://doi.org/10.1107/S1600576725008489
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