Kinetic effects in the mixed β to View the MathML source martensitic transformation in a Cu–Al–Ni shape memory alloy / J. Rodríguez-Aseguinolaza in Acta materialia, Vol. 58 N° 2 (Janvier 2010)  

Public ISBD [article]  inActa materialia > Vol. 58 N° 2 (Janvier 2010) . - pp. 692-701 Titre : Kinetic effects in the mixed β to View the MathML source martensitic transformation in a Cu–Al–Ni shape memory alloy Type de document : texte imprimé Auteurs : J. Rodríguez-Aseguinolaza, Auteur ; I. Ruiz-Larrea, Auteur ; M.L. Nó, Auteur Article en page(s) : pp. 692-701 Note générale : Métallurgie Langues : Anglais (eng) Mots-clés : Shape memory alloys Adiabatic calorimetry Martensitic transformation Cu–Al–Ni Phase kinetics Index. décimale : 669 Métallurgie Résumé : A single crystal with a selected composition of a Cu–Al–Ni shape memory alloy, undergoing two martensitic phase transformations when cooling from the common parent phase, View the MathML source, has been studied by adiabatic calorimetry. As the coexistence of two different martensites has a strong influence on the transformation kinetics, both the forward and the reverse phase martensitic transformation have been carefully studied by means of very low thermal rate dynamic thermograms. Temperature memory effects have been observed in the View the MathML source transformation but not in the View the MathML source one. Finally, radiation-cooling procedures were used to study the forward transformation and showed the interaction between the two types of martensite variants on the nucleation processes. This last technique was found useful to evaluate the latent heat released at each individual nucleation event, throughout the transformation progress. The consequent sample self-heating alters this process, which dramatically affects the View the MathML source ratio and the final martensitic state. DEWEY : 669 ISSN : 1359-6454 En ligne : http://www.sciencedirect.com/science?_ob=PublicationURL&_tockey=%23TOC%235556%23 [...] [article] Kinetic effects in the mixed β to View the MathML source martensitic transformation in a Cu–Al–Ni shape memory alloy [texte imprimé] / J. Rodríguez-Aseguinolaza, Auteur ; I. Ruiz-Larrea, Auteur ; M.L. Nó, Auteur . - pp. 692-701. Métallurgie Langues : Anglais (eng) in Acta materialia > Vol. 58 N° 2 (Janvier 2010) . - pp. 692-701 Mots-clés : Shape memory alloys Adiabatic calorimetry Martensitic transformation Cu–Al–Ni Phase kinetics Index. décimale : 669 Métallurgie Résumé : A single crystal with a selected composition of a Cu–Al–Ni shape memory alloy, undergoing two martensitic phase transformations when cooling from the common parent phase, View the MathML source, has been studied by adiabatic calorimetry. As the coexistence of two different martensites has a strong influence on the transformation kinetics, both the forward and the reverse phase martensitic transformation have been carefully studied by means of very low thermal rate dynamic thermograms. Temperature memory effects have been observed in the View the MathML source transformation but not in the View the MathML source one. Finally, radiation-cooling procedures were used to study the forward transformation and showed the interaction between the two types of martensite variants on the nucleation processes. This last technique was found useful to evaluate the latent heat released at each individual nucleation event, throughout the transformation progress. The consequent sample self-heating alters this process, which dramatically affects the View the MathML source ratio and the final martensitic state. DEWEY : 669 ISSN : 1359-6454 En ligne : http://www.sciencedirect.com/science?_ob=PublicationURL&_tockey=%23TOC%235556%23 [...]

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