Abstract
Abstract The yield stress of neutron irradiated αCu-Al, αCu-Ga and αCu-Ge single crystals has been studied during isochronal annealing from 100°c to 450°c. The temperature needed to achieve a given stage in the annealing is decreased with increasing solute additions. The return of the pre-irradiated strength in alloys containing 14 at. % Al, 14 at. % Ga and 7 at. % Ge takes place at temperatures in the range 200°c-350°c, rather than in the 300°c-450°c interval found for pure copper. The strength of Cu-14 at. % Al crystals was determined as a function of isothermal annealing at temperatures from 221°c to 304.5°c. Activation energies have been calculated from these data, and these are compared to values obtained elsewhere for pure copper crystals. Possible reasons are discussed for the decrease in this energy due to the solutes.
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More From: The Philosophical Magazine: A Journal of Theoretical Experimental and Applied Physics
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