Abstract
The deformation-induced dissolution of Ni3Ti intermetallics in the matrix of austenitic alloys of Fe–36Ni–3Ti type was revealed in the course of their cascade-forming neutron irradiation and cold deformation at low temperatures via employment of Mössbauer method. The anomalous deformation-related dissolution of the intermetallics has been explained by the migration of deformation-induced interstitial atoms from the particles into a matrix in the stress field of moving dislocations. When rising the deformation temperature, this process is substituted for by the intermetallics precipitation accelerated by point defects. A calculation of diffusion processes has shown the possibility of the realization of the low-temperature diffusion of interstitial atoms in configurations of the crowdions and dumbbell pairs at 77–173 K. The existence of interstitial atoms in the Fe–36Ni alloy irradiated by electrons or deformed at 77 K was substantiated in the experiments of the electrical resistivity measurements.
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Acknowledgements
The research was carried out within the state assignment of FASO of Russia (theme “Structure” No. 01201463331) under partial financial support from the Russian Scientific Foundation (Project No. 14-13-00908, part 3.2). The authors are grateful to Zamatovskii A.E. and Lyashkov K.A. for the aid in the work.
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Sagaradze, V., Shabashov, V., Kataeva, N. et al. Low Temperature Diffusion Transformations in Fe–Ni–Ti Alloys During Deformation and Irradiation. Met. Mater. Int. 24, 249–254 (2018). https://doi.org/10.1007/s12540-018-0046-2
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DOI: https://doi.org/10.1007/s12540-018-0046-2