Shape memory behavior of Ni-Fe-Ga and Ni-Mn-Sn ribbons
Por:
Villa, E., Agilar-Ortiz, C.O., Lvarez-Alonso, P.Á., Camarillo, J.P., Lara-Rodriguez, G.A., Flores-Zúñiga, H., Chernenko, V.A.
Publicada:
1 ene 2015
Resumen:
Magnetic Shape Memory Alloys exhibit multifunctional properties due the
martensitic transformation (MT) and accompanying changes in the magnetic
subsystem. In this work, melt spun ribbons of nominal composition
Ni55Fe16Ga29 (R1) and Ni50Mn40Sn10 (R2) have been produced and
characterized by the calorimetric, thermomechanical, mechanical,
microscopic and X-ray measurements. The effect of short annealing on MT
and thermo-mechanical properties is rather modest and in the case of R2
enhances its brittleness. R1 and R2 as-spun ribbons show MT at T-M
similar to 340 K and similar to 420 K, respectively. The strain-stress
curves for Ni-Fe-Ga in austenitic phase indicate good visco-elastic
properties, although the superelastic effect was not well pronounced.
Ni-Fe-Ga as-cast and annealed samples, as well as the as-cast Ni-Mn-Sn
ribbons, present a shape memory effect with an anomalous contraction and
elongation at low external stresses in the course of the forward and
reverse MT, consequence of the compressive internal stresses.
Filiaciones:
Villa, E.:
CNR IENI Unità di Lecco, Lecco, Italy
Agilar-Ortiz, C.O.:
División de Materiales Avanzados, IPICYT, San Luis Potosí, Mexico
Lvarez-Alonso, P.Á.:
Departamento de Electricidad y Electrónica, Universidad Del País Vasco (UPV/EHU), Leioa, Spain
Camarillo, J.P.:
División de Materiales Avanzados, IPICYT, San Luis Potosí, Mexico
Lara-Rodriguez, G.A.:
Instituto de Investigaciones en Materiales, Universidad Nacional Autonoma de Mexico, Mexico D.F., Mexico
Flores-Zúñiga, H.:
División de Materiales Avanzados, IPICYT, San Luis Potosí, Mexico
Chernenko, V.A.:
Ikerbasque, Basque Foundation for Science, Bilbao, Spain
BCMaterials and University of Basque Country (UPV/EHU), Bilbao, Spain
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