Microstructural and thermodynamic study of hypoeutectoidal Cu-Al-Ni shape memory alloys
Identifieur interne : 000506 ( Main/Exploration ); précédent : 000505; suivant : 000507Microstructural and thermodynamic study of hypoeutectoidal Cu-Al-Ni shape memory alloys
Auteurs : S. M. Chentouf [Algérie] ; M. Bouabdallah [Algérie] ; J-C. Gachon [France] ; E. Patoor [France] ; A. Sarid [Algérie]Source :
- Journal of alloys and compounds [ 0925-8388 ] ; 2009.
Descripteurs français
- Pascal (Inist)
- Microstructure, Transformation martensitique, Trempe eau, Température ambiante, Traitement thermique, Calorimétrie différentielle balayage, Analyse diffraction RX, Microscopie électronique transmission, Précipitation, Diffraction RX, Cuivre, Nickel alliage, Alliage mémoire forme, Polycristal, Nitrure de ruthénium, RuN, 8130K.
- Wicri :
- topic : Cuivre.
English descriptors
- KwdEn :
Abstract
Cu-Al-Ni hypoeutectoidal shape memory alloys have been studied. Polycrystalline specimens have been quenched (into water at room temperature) after heat treatment at 850 °C and followed by two successive runs from room temperature to 650°C and inversely. The microstructural and thermodynamic studies presented in this work have been performed using DSC (differential scanning calorimetry), X-ray diffraction analysis at a variable temperature and TEM (transmission electron microscopy) analysis. Stable phase precipitation of AlNi type was observed to appear in these hypoeutectoidal alloys. The thermodynamic study has showed that the martensitic transformation in heating needs a greater energy than that of the reverse transformation.
Affiliations:
- Algérie, France
- Grand Est, Lorraine (région), Wilaya d'Alger
- Alger, Metz, Vandoeuvre lès Nancy
- Université Henri Poincaré
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Le document en format XML
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<term>Martensitic transformations</term>
<term>Microstructure</term>
<term>Nickel alloys</term>
<term>Polycrystals</term>
<term>Precipitation</term>
<term>Ruthenium nitride</term>
<term>Shape memory alloy</term>
<term>Transmission electron microscopy</term>
<term>Water quenching</term>
<term>X-ray diffraction analysis</term>
<term>XRD</term>
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<term>Transformation martensitique</term>
<term>Trempe eau</term>
<term>Température ambiante</term>
<term>Traitement thermique</term>
<term>Calorimétrie différentielle balayage</term>
<term>Analyse diffraction RX</term>
<term>Microscopie électronique transmission</term>
<term>Précipitation</term>
<term>Diffraction RX</term>
<term>Cuivre</term>
<term>Nickel alliage</term>
<term>Alliage mémoire forme</term>
<term>Polycristal</term>
<term>Nitrure de ruthénium</term>
<term>RuN</term>
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<front><div type="abstract" xml:lang="en">Cu-Al-Ni hypoeutectoidal shape memory alloys have been studied. Polycrystalline specimens have been quenched (into water at room temperature) after heat treatment at 850 °C and followed by two successive runs from room temperature to 650°C and inversely. The microstructural and thermodynamic studies presented in this work have been performed using DSC (differential scanning calorimetry), X-ray diffraction analysis at a variable temperature and TEM (transmission electron microscopy) analysis. Stable phase precipitation of AlNi type was observed to appear in these hypoeutectoidal alloys. The thermodynamic study has showed that the martensitic transformation in heating needs a greater energy than that of the reverse transformation.</div>
</front>
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