Influence of deformation inhomogeneity on the annealing behavior of drawn oxygen-free high conducting copper

Autor: Daudi R. Waryoba, Peter N. Kalu, Jagabanduhu Chakrabarty, Primus V. Mtenga
Rok vydání: 2013
Předmět:
Zdroj: Journal of Materials Research. 28:774-784
ISSN: 2044-5326
0884-2914
DOI: 10.1557/jmr.2012.433
Popis: Oxygen-free high conducting copper wires drawn to true strains of 2.3, 3.1, and 3.6 exhibit inhomogeneity in the form of three distinct concentric regimes: the inner core, the midsection, and the outer region. While the microtexture of the inner core was dominated by a strong + weak duplex fiber texture, the midsection and the outer region had a comparatively weaker texture. An upper bound plasticity modeling and the nanohardness measurement revealed that the midsection was the most strained region. Upon annealing at 170 °C, the 2.3-strained wire did not recrystallize, whereas the 3.1- and 3.6-strained wires exhibited partial recrystallization. For the 3.6 wire, the inner core was unrecrystallized, while the midsection and outer region recrystallized with strong + weak fiber texture. The recrystallized grains were classified as type “A” grains, which grew laterally with //DD orientation, and type “B” grains, which generally grew axially with //DD orientation.
Databáze: OpenAIRE
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