ENCYCLOPÉDIE DE LA RECHERCHE SUR L’ALUMINIUM AU QUÉBEC 2013 | Page 65
DÉVELOPPEMENT, OPTIMISATION ET INTÉGRATION DES PROCÉDÉS DE FABRICATION ET DE CONCEPTION
Étude du Comportement au vieillissement à la température MANUFACTURING AND DESIGN
DEVELOPMENT, OPTIMIZATION AND PROCESS INTEGRATION OF de
63
350°C d’un alliage à mémoire de forme de type
Cu- 11.4 wt.% Al- 0.52 wt.% Be
ÉTUDE DU COMPORTEMENT AU VIEILLISSEMENT À LA TEMPÉRATURE DE 350°C
D’UN study of À 11.4 wt.% Al- FORME DE TYPE Cu- 11.4 wt.% Al- 0.52 wt.% Be
BehaviourALLIAGECu-MÉMOIRE DE 0.52 wt.% Be
shape memory alloy at 350°C ageing temperature
BEHAVIOUR STUDY OF Cu- 11.4 wt.% Al- 0.52 wt.%
BE SHAPE MEMORY ALLOY AT 350°C AGEING TEMPERATURE
S.M.CHENTOUF*(1,2,3), M.BOUABDALLAH(1), M.JAHAZI(2)
*Post-doc,Auteur
contact :
1,
Author2
[email protected]
(1) Laboratoire de Génie Sismique et Dynamique 1 Département et Nationale polytechnique (Alger, Algérie)- (2) Département de
des Structures, École Institution 1
génie mécanique, École de Technologie Supérieure (Montréal (QC), Canada) - (3) Département de science des matériaux, Université
2
des Sciences et de department Houari Boumediene (Alger, Algérie)
la Technologie and Institution 2.
Objective: Study the behaviour on the metastable austenitic phase of hypoeutectoid Cu–Al–Be shape memory alloy under thermal precipitations and
their effects on the alloy global microstructure. The results are expected to benefit the applications of copper-based shape memory alloys under
various conditions.
SHAPE MEMORY BEHAVIOUR
LITERATURE
After several cycles
of material education
Stage 1 : None deformed metastable
β1 phase
Stage 2 : Deformed metastable
β1 phase
Stage 3 : Warming deformed metastable
Stage 4 : Cooling deformed metastable
β1 phase
β1 phase
METHODS
After betatizing for 30 min at 750 C, the ingot was water quenched to
obtain the metastable β1 phase at room temperature.
The martensite transformation start (Ms) temperature for this alloy was
determined by DSC to be −37 C.
In case of isothermal treatment, the samples were first heat treated at
350
C for 0.3 to 864 ks (240 h), (two samples each time), and
subsequently air-cooled.
The first sample group was treated inside a Setaram DSC 131
calorimeter, under nit ɽ