TY - GEN
T1 - Texture and microstructure variation in severe plastic deformed OFHC Cu wires
AU - Kalu, Peter N.
AU - Waryoba, Daudi R.
PY - 2007
Y1 - 2007
N2 - The texture and microstructure resulting from heavily drawn and annealed oxygen-free high conducting (OFHC) copper wires have been investigated using several microscopical techniques including orientation imaging microscopy and nano-indentation. In the as-drawn condition, the microstructure and texture were heterogeneous across the wires, and consisted of three distinct concentric regimes: the inner core, the mid section, and the outer region. Whilst the microtexture of the inner core was dominated by a strong <111>+weak< 100> duplex fiber texture, the mid section and the outer region had a comparatively weak fiber texture. Analysis using a Taylor-type viscoplasticity model revealed that the weak texture observed in this material was a direct consequence of shear deformation during drawing. The recrystallization kinetics of the wires upon isothermal annealing at various temperature was influenced by the deformation heterogeneity, and can be accurately described by a modified JMAK-Microhardness model. In this approach, the JMAK model is expressed in terms of microhardness data, from which the parameters of the different restoration kinetics were determined.
AB - The texture and microstructure resulting from heavily drawn and annealed oxygen-free high conducting (OFHC) copper wires have been investigated using several microscopical techniques including orientation imaging microscopy and nano-indentation. In the as-drawn condition, the microstructure and texture were heterogeneous across the wires, and consisted of three distinct concentric regimes: the inner core, the mid section, and the outer region. Whilst the microtexture of the inner core was dominated by a strong <111>+weak< 100> duplex fiber texture, the mid section and the outer region had a comparatively weak fiber texture. Analysis using a Taylor-type viscoplasticity model revealed that the weak texture observed in this material was a direct consequence of shear deformation during drawing. The recrystallization kinetics of the wires upon isothermal annealing at various temperature was influenced by the deformation heterogeneity, and can be accurately described by a modified JMAK-Microhardness model. In this approach, the JMAK model is expressed in terms of microhardness data, from which the parameters of the different restoration kinetics were determined.
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U2 - 10.4028/0-87849-434-0.509
DO - 10.4028/0-87849-434-0.509
M3 - Conference contribution
AN - SCOPUS:38449089908
SN - 0878494340
SN - 9780878494347
T3 - Materials Science Forum
SP - 509
EP - 514
BT - Fundamentals of Deformation and Annealing - Proceedings of the International Symposium held to coincide with the retirement of Professor John Humphreys
PB - Trans Tech Publications Ltd
T2 - International Symposium on Fundamentals of Deformation and Annealing
Y2 - 5 September 2006 through 7 September 2006
ER -