Comportement de l’austénite mère aux traitements lents au dessus de Af dans les alliages AMF à base de Cu-Al-Ni

M. Bouabdallah; H. Cheniti; N. Achour; G. Cizeron

doi:doi:10.1051/jp4:2004122015

Accès gratuit

Numéro		J. Phys. IV France Volume 122, December 2004


Page(s)		97 - 101
DOI		https://doi.org/10.1051/jp4:2004122015

J. Phys. IV France 122 (2004) 97-101
DOI: 10.1051/jp4:2004122015

Comportement de l'austénite mère aux traitements lents au dessus de Af dans les alliages AMF à base de Cu-Al-Ni

M. Bouabdallah¹, H. Cheniti¹, N. Achour¹ and G. Cizeron²

¹ Laboratoire de Science et Génie des Matériaux, Département de Métallurgie, École Nationale Polytechnique, 10 Avenue Hassen Badi, Alger, Algérie
² Laboratoire de Structure des Matériaux Métalliques, Université de paris-Sud, bâtiment 414, 91940 Orsay Cedex, France

Abstract
On heating at temperature upper then Af and then cooled at room temperature, the initially quenched structure of the Cu - Al - Ni SMA changes significantly. These changes in the structure depend essentially of the heating speed and the maximal temperature reached. Consequently, the martensitic transformation temperatures rise up. In the present study, two modes of processing are applied on the alloy: a slow heating and cooling, and an isothermal treatment at 400 °C during several times and then cooled quickly to room temperature. The samples are observed by metallographic method and analyzed by XR diffraction. The mode of transformation of the parent phase b1 into the equilibrium phase $\alpha + \gamma_{\rm 2}$ is also determined.