1Nikko Copper Works, The Furukawa Electric Co. Ltd., Nikko
The changes with time in the elastic constant of copper dilute alloys subjected to cold bending have been measured at room temperature in an attempt to examine the correlation between dislocations caussed by deformation and solute atoms in specimens. The alloy specimens contain less than 1 wt% solute atoms (Sn, Ge, Mg). The experimental results are summarized as follows:
(1) Young's modulus of specimens subjected to cold bending is increased with time. The variation of Young's modulus, expressed in terms of the variation of the resonant frequency ( Δ f), can be given as follows:
|Δ f=a log t,|
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