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|Vibrational behaviour of bcc Cu-based shape memory alloys close to the martensitic transition
|Planes Vila, Antoni
Vives i Santa-Eulàlia, Eduard
|The American Physical Society
|Experimental 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 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.
|Reproducció digital del document publicat en format paper, proporcionada per PROLA i http://dx.doi.org/10.1103/PhysRevB.53.3039
|It is part of:
|Physical Review B, 1996, vol. 53, núm. 6, p. 3039-3046
|Appears in Collections:
|Articles publicats en revistes (Física Quàntica i Astrofísica)
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