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Precipitation Process in Cu-0.2%Cr-0.05%Zr Alloy Studied by the Electrical Resistivity Measurements  

Koo, B.H. (School of Nano & Advanced Materials Engineering, Changwon National University, Korea Institute of Machinery & Materials)
Lee, C.G. (School of Nano & Advanced Materials Engineering, Changwon National University, Korea Institute of Machinery & Materials)
Kim, C.J. (School of Nano & Advanced Materials Engineering, Changwon National University, Korea Institute of Machinery & Materials)
Bae, D.S. (School of Nano & Advanced Materials Engineering, Changwon National University, Korea Institute of Machinery & Materials)
Publication Information
Journal of the Korean Society for Heat Treatment / v.18, no.5, 2005 , pp. 312-317 More about this Journal
Abstract
The precipitation process in Cu-0.2 wt.%Cr-0.05 wt.%Zr alloys has been studied by electrical electrical resistivity measurements. The kinetics of precipitation could be well described by Johnson-Mehl-Avrami equation, $f(t)=1-\exp(-kt^n)$. The values of n were found to be in the range of 0.36~0.42 at first stage and 1.3~1.6 at second stage. The activation energy was determined by cross-cut method and was 80~89 kJ/mol. The value is similar to the energy for the migration of either a vacancy or a vacancy-solute complex through the lattice.
Keywords
Cu-Cr-Zr; Johnson-Mehl-Avrami; Electrical Resistivity; Precipitation; Activation Energy; n;
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