Fulltext

Characterization of defects in a martensitic CuAlNi shape-memory alloy

Van Petegem, S. ; Segers, D. ; Pelosin, V. ; Kuriplach, J.

In: Applied Physics A, 2005, vol. 81, no. 5, p. 1039-1044

Aggiungi alla tua lista
    Titre
    • Characterization of defects in a martensitic CuAlNi shape-memory alloy
    Auteur
    • Van Petegem, S.. Paul Scherrer Institute, NUM/ASQ, PSI 5232, Villigen, Switzerland
    • Segers, D.. Department of Subatomic and Radiation Physics, Ghent University, Proeftuinstraat 86, 9000, Ghent, Belgium
    • Pelosin, V.. Laboratoire de Mécanique et de Physique des Matériaux, ENSMA, CNRS, 86961, Futuroscope, France
    • Kuriplach, J.. Department of Low Temperature Physics, Charles University, Prague, Czech Republic
    Type de document
    • Postprint
    Langue
    • Inglese
    Publié dans
    • Applied Physics A, 2005, vol. 81, no. 5, p. 1039-1044. Springer Berlin Heidelberg; www.springer.de
    Autre version électronique
    Classification
    • Technologie, Sciences de l'ingénieur
    Identifiant OAI-PMH
    • oai:doc.rero.ch:314459
    Summary
    A water-quenched martensitic CuAlNi shape-memory alloy was investigated by a combination of coincidence Doppler broadening and positron-lifetime spectroscopy, supported by positron-lifetime calculations. We find a high defect concentration in the as-quenched samples. The positron-lifetime calculations suggest that the defects are not only single vacancies but also vacancies associated with dislocations and stacking faults. Annealing in the martensitic phase has no significant influence on the vacancy concentration but results in a different chemical environment around the vacancies. After aging in the austenitic phase the vacancy concentration decreases significantly