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Abstract
Structural anisotropy and excess volume in ultra-finegrained high-purity nickel prepared by equal-channel angu-lar pressing (ECAP) is studied by means of dilatometry andcompared with the processing route of high-pressure tor-sion. Both routes exhibit qualitatively similar three-stagebehavior in length change upon defect annealing with acharacteristic dependence on the measuring direction re-lated to the deformation axes. Taking into account shapeanisotropy of the crystallites, the length change in variousdirections can be quantitatively analyzed yielding directaccess to the concentration of deformation-induced latticevacancies, the vacancy relaxation, and the grain boundaryexpansion. The routes A12 and BC12 of ECAP are com-pared.
Originalsprache | englisch |
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Seiten (von - bis) | 81-88 |
Fachzeitschrift | International Journal of Materials Research |
Jahrgang | 108 |
DOIs | |
Publikationsstatus | Veröffentlicht - 2017 |
Fields of Expertise
- Advanced Materials Science
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