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Aging behavior in Cu-Al-Be shape memory alloy
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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.
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SOMOZA, Alberto, et al. Aging behavior in Cu-Al-Be shape memory alloy. Journal of Applied Physics. 1999. Vol. 85, num. 1, pags. 130-133. ISSN 0021-8979. [consulted: 25 of June of 2026]. Available at: https://hdl.handle.net/2445/24158