High-pressure torsion-induced grain growth in electrodeposited nanocrystalline Ni

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Abstract

Deformation-induced grain growth has been reported in nanocrystalline (nc) materials under indentation and severe cyclic loading, but not under any other deformation mode. This raises an issue on critical conditions for grain growth in nc materials. This study investigates deformation-induced grain growth in electrodeposited nc Ni during high-pressure torsion (HPT). Our results indicate that high stress and severe plastic deformation are required for inducing grain growth, and the upper limit of grain size is determined by the deformation mode and parameters. Also, texture evolution suggests that grain-boundary-mediated mechanisms played a significant role in accommodating HPT strain. © 2006 American Institute of Physics.

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Liao, X. Z., Kilmametov, A. R., Valiev, R. Z., Gao, H., Li, X., Mukherjee, A. K., … Zhu, Y. T. (2006). High-pressure torsion-induced grain growth in electrodeposited nanocrystalline Ni. Applied Physics Letters, 88(2), 1–3. https://doi.org/10.1063/1.2159088

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