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Title: Aging behavior in Cu-Al-Be shape memory alloy
Author: Somoza, Alberto
Romero, Ricardo
Mañosa, Lluís
Planes Vila, Antoni
Keywords: Transformacions martensítiques
Ciència dels materials
Martensitic transformations
Materials science
Issue Date: 1-Jan-1999
Publisher: American Institute of Physics
Abstract: This article reports positron annihilation spectroscopy and calorimetric measurements of the aging behavior in a Cu¿Al¿Be shape memory alloy. An excess of single vacancies is retained in the alloy as a result of a quench. All vacancies in excess disappear after long aging time, and a migration energy EM = 1.0±0.1 eV for this process has been found to be larger than in other Cu-based shape memory alloys. The good correlation found for the concentration of vacancies and the shift in the martensitic transition temperature demonstrates that, in Cu¿Al¿Be, changes in the transition after a quench are deeply related to the excess of vacancies.
Note: Reproducció del document publicat a:
It is part of: Journal of Applied Physics, 1999, vol. 85, núm. 1, p. 130-133
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ISSN: 0021-8979
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)

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