J. Phys. IV France 112 (2003) 601
DOI: 10.1051/jp4:2003957

LACBED characterization of dislocations in Cu-Al-Ni shape memory alloys processed by powder metallurgy

P.P. Rodriguez¹, A. Ibarra¹, J. San Jean², J.P. Morniro³ and M.L. No<sup>1

1</sup>  Departamento de Fisica Aplicada fi, 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  laboratoire de Métallurgie Physique et Génie des Matériaux, UMR 8517 du CNRS, bâtiment C6, Université des Sciences et Technologies de Lille, 59655 Villeneuve-d'Ascq cedex, France

Abstract
Powder metallurgy Cu-AI-Ni shape memory alloys show excellent thermomechanical properties, being the fracture behavior close to the one observed in single crystals. However, the microstructural mechanisms responsible of such behavior are still under study. In this paper we present the characterization of the dislocations present in these alloys by Large Angle Convergent Beam Electron Diffraction (LACBED) in two different stages of the elaboration process: after HIP compaction and after hot rolling.

© EDP Sciences 2003