J. Phys. IV France 112 (2003) 575
DOI: 10.1051/jp4:2003951

Martensitic transformation in Cu-Al-Ni shape memory alloys obtained by ball milling

P.P. Rodriguez¹, R.B. Pérez-Saez², J.I. Pérez-Landazabal³, V. Recarte³, O.A. Ruano⁴, M.L. No¹ and J. San Juan<sup>2

1</sup>  Departamento de Fisica Aplicada II, Facultad de Ciencias, Universidad del Pais Vasco, Apdo. 644, 48080 Bilbao, Spain
²  Departamento de Fisica de la Materia Condensada, Facultad de Ciencias, Universidad del Pais Vasco, Apdo. 644, 48080 Bilbao, Spain
³  Departamento de Fisica, Universidad Publica de Navarra, Campus de Arrosadia, 31006 Pamplona, Spain
⁴  Centro Nacional de Investigaciones Metalurgicas (CENIM), Gregorio del Amo 8, 28040 Madrid, Spain

Abstract
The most important disadvantage of Cu-Al-Ni shape memory alloys concerns their high brittleness. Previous works have allowed us to show that powder metallurgy is an excellent way to improve the thermomechanical behavior of these alloys. However, the powder metallurgy processing method still shows some drawbacks, which can be overcome if powders are mechanically milled before compacting. In this work we present the study of the martensitic transformation of the alloy in the different stages of the elaboration process in order to evidence the way to elaborate a final alloy with the desired transformation temperatures starting from a mixture of available powders of different compositions.

© EDP Sciences 2003