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HomeDefect and Diffusion ForumDefect and Diffusion Forum Vol. 383Effect of Equal Channel and Dynamic Channel...

Effect of Equal Channel and Dynamic Channel Angular Pressing of Ni and Further Heat Treatment on its Structure and Grain Boundary Diffusion

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Abstract:

Formation of microstructure in Ni under equal-channel angular pressing (ECAP) and dynamic channel-angular pressing (DCAP), its thermal stability and diffusion properties of grain boundaries are investigated. Grain boundary diffusion in the ultrafine-grained Ni is found to be significantly faster than in the coarse-grained Ni, which indicates a 'non-equilibrium' (deformation-modified) state of grain boundaries in the former. The effect of non-equilibrium state of grain boundaries on the level of internal stresses is analyzed.

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Diffusion in Materials DIMAT-2017

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Periodical:

Defect and Diffusion Forum (Volume 383)

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96-102

DOI:

https://doi.org/10.4028/www.scientific.net/DDF.383.96

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Online since:

February 2018

Authors:

Vladimir V. Popov*, Gerrit Reglitz, Evgeniy V. Shorohov, E.N. Popova, Alexey V. Stolbovsky, Sergiy V. Divinski, Gerhard Wilde

Keywords:

Grain Boundary Diffusion, Nickel, Radiotracer Method, Severe Plastic Deformation

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