Planes Vila, AntoniMañosa, LluísVives i Santa-Eulàlia, Eduard2009-12-232009-12-2319960163-1829https://hdl.handle.net/2445/10450Experimental data from ultrasonic and inelastic neutron scattering measurements are analyzed for different families of Cu-based shape-memory alloys. It is shown that the transition occurs at a value, independent of composition and alloy family, of the ratio between the elastic constants associated with the two shears necessary to accomplish the lattice distortion from the bcc to the close-packed structure. The zone boundary frequency of the TA2[110] branch evaluated at the transition point (TM), weakly depends, for each family, on composition. A linear relationship between this frequency and the inverse of the elastic constant C', both quantities evaluated at TM, has been found, in agreement with the prediction of a Landau model proposed for martensitic transformations.8 p.application/pdfeng(c) The American Physical Society, 1996Matèria condensadaAliatgesTransformacions martensítiquesCondensed matterAlloysMartensitic transformationsinfo:eu-repo/semantics/article112059info:eu-repo/semantics/openAccess