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Evolution of Ni structure under ECAP and DCAP and further annealing

V. V. Popov, E. N. Popova, D. D. Kuznetsov, A. V. Stolbovsky, G. Reglitz, S. Divinski, G. Wilde, E. V. Shorohov

Materials Science Forum, 879, 1507-1512, (2017)

DOI: 10.4028/www.scientific.net/MSF.879.1507

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Evolution of structure and properties of Ni under severe plastic deformation by equal-channel angular pressing (ECAP) and dynamic channel-angular pressing (DCAP) has been studied by transmission and scanning electron microscopy and microhardness measurements, and the differences in formation of submicrocrystalline structure under different deformation techniques have been revealed. The thermal stability of structure obtained by these methods is compared. It is demonstrated that under the DCAP processing the material is strengthened faster, by lesser number of passes, and microstructure’s thermal stability is somewhat lower after ECAP compared to that after DCAP, although after equal number of passes ECAP results in a more homogeneous microstructure.

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