J. Phys. IV France
Volume 11, Number PR8, Novembre 2001Fifth European Symposium on Martensitic Transformations and Shape Memory Alloys
|Page(s)||Pr8-135 - Pr8-140|
J. Phys. IV France 11 (2001) Pr8-135-Pr8-140
The stabilization of martensite in Cu-Zn-Al-Ti-B shape memory alloysR. Romero and M. Stipcich
Instituto de Fisica de Materiales Tandil (IFIMAT), Facultad de Ciencias Exactas, Universidad Nacional del Centro de la Provincia de Buenos Aires, Pinto 399, 7000 Tandil, Argentina, y Comisión de Investigaciones Científicas de la Provincia de Buenos Aires, Argentina
Recent studies on aging effects in the martensite phase have shown that the addition of Ti-B to Cu-Zn-Al shape memory alloy has a notable influence on stabilization characteristics of this alloy. The overall process is delayed and the stabilization magnitude is significantly diminished. In an attempt to understand this effect the experimental results are analyzed within a cluster rearrangement model. The characteristic energy values are determined and compared with those obtained in single crystal experiments. The obtained results suggest the formation of vacancy-Ti complexes that increase the average vacancy migration energy for about 25%.
© EDP Sciences 2001