IFEG 20353
INSTITUTO DE FISICA ENRIQUE GAVIOLA
Unidad Ejecutora - UE
artículos
Título:
The influence of microstructure on the martensitic transformation in Cu-Zn-Al melt spun ribbons
Autor/es:
J.L. PELEGRINA; L.M. FABIETTI; A.M. CONDÓ; G. POZO LÓPEZ; S.E. URRETA
Revista:
PHILOSOPHICAL MAGAZINE
Editorial:
TAYLOR & FRANCIS LTD
Referencias:
Año: 2010 vol. 90 p. 2793 - 2805
ISSN:
1478-6435
Resumen:
The martensitic transformation is investigated in a set of twin roller melt spun Cu-Zn-Al shape memory alloys, solidified at tangential wheel speeds between 20 and 40 m/s. The resulting microstructures are analyzed using X-ray diffraction, optical and transmission electron microscopy techniques. The characteristic martensitic transformation temperature MS is determined for each condition by conventional resistometric methods. The ribbons are homogeneous in shape and for each quenching rate they exhibit a quite uniform MS temperature. By proper thermal treatments, the different factors affecting MS could be separately examined and from temperature measurements, the contribution of L21 antiphase boundaries evaluated. A calculation of this contribution using pair interchange energies is in good agreement with the experimental results.
