Fracture behaviour of Cu-Al-Ni shape memory alloys obtained by powder metallurgy

Authors

  • P. P. Rodríguez Dpto. Física Aplicada II. Facultad de Ciencias. Universidad del País Vasco
  • R. B. Pérez-Sáez Dpto. Física de la Materia Condensada. Facultad de Ciencias. Universidad del País Vasco.
  • V. Recarte Dpto. Física de la Materia Condensada. Facultad de Ciencias. Universidad del País Vasco.
  • J. M. Millán Dpto. Física de la Materia Condensada. Facultad de Ciencias. Universidad del País Vasco.
  • O. A. Ruano Centro Nacional de Investigaciones Metalúrgicas (CENIM). Madrid
  • M. L. Nó Dpto. Física Aplicada II. Facultad de Ciencias. Universidad del País Vasco

DOI:

https://doi.org/10.3989/revmetalm.2001.v37.i2.464

Keywords:

Shape memory alloys, Powder metallurgy, Cu-Al-Ni, Fracture, Subboundaries,

Abstract


Polycrystalline Cu-Al-Ni shape memory alloys have been scarcely employed for technological applications due to their high brittleness. The development of a new elaboration technique based on powder metallurgy has recently overcome this problem, through the improvement of the ductility of the produced alloy without affecting its shape memory properties. The fracture behaviour of an alloy obtained using this elaboration technique has been studied by means of Scanning Electron Microscopy and mechanical testing. The results show a ductile fracture with a maximum strain close to 13%, which is the best fracture behaviour obtained for Cu-Al-Ni polycrystals. The microstructure of such alloy has been studied by means of Transmission Electron Microscopy, showing a poligonyzed structure in which martensite plates passing through the subboundaries easily.

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Published

2001-04-30

How to Cite

Rodríguez, P. P., Pérez-Sáez, R. B., Recarte, V., Millán, J. M., Ruano, O. A., & Nó, M. L. (2001). Fracture behaviour of Cu-Al-Ni shape memory alloys obtained by powder metallurgy. Revista De Metalurgia, 37(2), 194–198. https://doi.org/10.3989/revmetalm.2001.v37.i2.464

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