NickelMaghrebV1, France, Analysis, bibRecord, 000052

Precipitation sequence during ageing in β1 phase of Cu-Al-Ni shape memory alloy : Advanced Thermal Science in France

Identifieur interne : 000052 ( France/Analysis ); précédent : 000051; suivant : 000053

Precipitation sequence during ageing in β1 phase of Cu-Al-Ni shape memory alloy : Advanced Thermal Science in France

Auteurs : Mabrouk Bouabdallah [Algérie] ; Ghalia Baguenane-Benalia [Algérie] ; Amar Saadi [Algérie] ; Hicham Cheniti [Algérie] ; Jean-Claude Gachon [France] ; Etienne Patoor [France]

Source :

Journal of thermal analysis and calorimetry [ 1388-6150 ] ; 2013.

RBID : Pascal:13-0286695

Descripteurs français

Pascal (Inist)
- Précipitation chimique, Vieillissement, Alliage mémoire forme, Thermoélasticité, Transformation martensitique, Cuivre alliage, Aluminium alliage, Nickel alliage, Caractérisation, Microscopie électronique transmission, Calorimétrie différentielle balayage, Morphologie, Structure surface, Analyse thermique, 8130K.

English descriptors

KwdEn :
- Aging, Aluminium alloys, Characterization, Chemical precipitation, Copper alloys, Differential scanning calorimetry, Martensitic transformations, Morphology, Nickel alloys, Shape memory alloy, Surface structure, Thermal analysis, Thermoelasticity, Transmission electron microscopy.

Abstract

The shape memory alloys based on the ternary system Cu-Al-Ni are able to produce a memory effect at high temperatures. However, if the material undergoes an accidental overheating, a transformation process leads to progressive loss of its characteristics. In this study, the effect of ageing on the metastable β₁(austenite) phase of a Cu-13.3 %Al-4 %Ni shape memory alloy was investigated. In addition, the effects of heating rate between 450 and 580 °C on the structural transformations of austenite after cooling to room temperature were studied. Observation by transmission electron microscopy of the structure that has undergone an isothermal ageing shows that the precipitation process depends on the maximum ageing temperature. Furthermore, calorimetric analysis shows that precipitates dissolution is possible when rapid heating between 450 and 580 °C. This behaviour is observed on the cooling diagram which shows a martensitic transformation.

Affiliations:

Algérie, France
Grand Est, Lorraine (région), Wilaya d'Alger
Alger, Metz, Nancy

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Pascal:13-0286695

Le document en format XML

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<front><div type="abstract" xml:lang="en">The shape memory alloys based on the ternary system Cu-Al-Ni are able to produce a memory effect at high temperatures. However, if the material undergoes an accidental overheating, a transformation process leads to progressive loss of its characteristics. In this study, the effect of ageing on the metastable β<sub>1 </sub>
(austenite) phase of a Cu-13.3 %Al-4 %Ni shape memory alloy was investigated. In addition, the effects of heating rate between 450 and 580 °C on the structural transformations of austenite after cooling to room temperature were studied. Observation by transmission electron microscopy of the structure that has undergone an isothermal ageing shows that the precipitation process depends on the maximum ageing temperature. Furthermore, calorimetric analysis shows that precipitates dissolution is possible when rapid heating between 450 and 580 °C. This behaviour is observed on the cooling diagram which shows a martensitic transformation.</div>
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Precipitation sequence during ageing in β1 phase of Cu-Al-Ni shape memory alloy : Advanced Thermal Science in France

Precipitation sequence during ageing in β1 phase of Cu-Al-Ni shape memory alloy : Advanced Thermal Science in France

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Links to Exploration step

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri