Thermal Stability and Structural Relaxation Kinetics of Commercially Pure Titanium
Abstract
This work explores the structural relaxation of cryorolled commercially pure titanium subjected to subsequent annealing.Nanostructured specimens with an average grain size of ~50 nm were produced by plastic deformation via cryogenic rolling at 100 K to a true strain of 1.20, followed by annealing at 425 K, 525 K, 725 K, and 945 K. Microstructural evolution was examined using electron microscopy and X-ray diffraction. Cryogenic rolling was found to induce pronounced grain fragmentation, with coherent scattering regions (CSRs) of 30-50 nm dominating the substructure. X-ray diffraction analysis revealed that annealing drives crystallite growth: a slight increase at 525 K, accelerated coarsening at 725 K, and complete recrystallization at 945 K. The kinetics of grain growth follow the classical Lifshitz-Slyozov-Wagner model, with a growth exponent of ~4, reflecting the role of triple junctions and defect-controlled boundary diffusion. The activation energy, estimated at ~97 kJ/mol, corresponds to typical values for grain boundary diffusion in α-Ti, confirming that cryogenic deformation produces a highly non-equilibrium microstructure whose relaxation is strongly temperature dependent.
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BibTeX
@misc{semerenko2026thermal,
title = {{Thermal Stability and Structural Relaxation Kinetics of Commercially Pure Titanium}},
author = {Y. Semerenko and N. Galtsov and D. Hurova and T. Bednarchuk and P. Zinoviev and V. Zoryansky and V. Moskalenko and R. Smolianets and A. Smirnov and Y. Pohribna and N. Aksenova},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.40737},
eprint = {2610.40737},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.40737},
}
RIS
TY - UNPB
TI - Thermal Stability and Structural Relaxation Kinetics of Commercially Pure Titanium
AU - Y. Semerenko
AU - N. Galtsov
AU - D. Hurova
AU - T. Bednarchuk
AU - P. Zinoviev
AU - V. Zoryansky
AU - V. Moskalenko
AU - R. Smolianets
AU - A. Smirnov
AU - Y. Pohribna
AU - N. Aksenova
PY - 2026
DA - 2026/10/29
PB - arXiv
DO - 10.48550/arxiv.2610.40737
UR - https://arxiv.org/abs/2610.40737
AB - This work explores the structural relaxation of cryorolled commercially pure titanium subjected to subsequent annealing.Nanostructured specimens with an average grain size of ~50 nm were produced by plastic deformation via cryogenic rolling at 100 K to a true strain of 1.20, followed by annealing at 425 K, 525 K, 725 K, and 945 K. Microstructural evolution was examined using electron microscopy and X-ray diffraction. Cryogenic rolling was found to induce pronounced grain fragmentation, with coherent scattering regions (CSRs) of 30-50 nm dominating the substructure. X-ray diffraction analysis revealed that annealing drives crystallite growth: a slight increase at 525 K, accelerated coarsening at 725 K, and complete recrystallization at 945 K. The kinetics of grain growth follow the classical Lifshitz-Slyozov-Wagner model, with a growth exponent of ~4, reflecting the role of triple junctions and defect-controlled boundary diffusion. The activation energy, estimated at ~97 kJ/mol, corresponds to typical values for grain boundary diffusion in α-Ti, confirming that cryogenic deformation produces a highly non-equilibrium microstructure whose relaxation is strongly temperature dependent.
ER -