Mechanical dynamical spectroscopy in CuLi alloys produced by electrodeposition

Cu-Li alloys obtained by electrodeposition were studied by means of the mechanical dynamical spectroscopy (MDS) technique (also called mechanical spectroscopy), which consists of the simultaneous measurement of the damping and the elastic modulus as a function of temperature. In this work the MDS measurements were performed as a function of temperature. Also the strain amplitude dependent damping behaviour was studied. mping spectrum of pure copper as a function of temperature shows low and the intermediate temperature grain boundary damping peaks at approximately 500 and 750 K respectively. It should be pointed out that, in the Cu-Li alloys a new peak at 625 K was found. This new peak could be the result of two physical effects, which are overlapped. The first effect would be a peak owing to the melting of the Cu 18 at.% Li crystals and the second effect would be a peak owing to the Zenerʹs pair reorientation mechanism. fluence of the thermomechanical state of the samples before being electrodeposited was investigated, and the changes in the MDS spectra, measured during heating and cooling were also investigated.