Document type
ArticleVersion
Published versionPublication date
All rights reserved
Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/10468
On the stability of the bcc phase in Cu-Al-Mn shape memory alloys
Journal Title
Director/Tutor
Journal ISSN
Volume Title
Related resource
Abstract
Measurements of the entropy change at the martensitic transition of two composition-related sets of Cu-Al-Mn shape-memory alloys are reported. It is found that most of the entropy change has a vibrational origin, and depends only on the particular close-packed structure of the low-temperature phase. Using data from the literature for other Cu-based alloys, this result is shown to be general. In addition, it is shown that the martensitic structure changes from 18R to 2H when the ratio of conduction electrons per atom reaches the same value as the eutectoid point in the equilibrium phase diagram. This finding indicates that the structure of the metastable low-temperature phase is reminiscent of the equilibrium structure.
Subject (English)
Citation
Citation
OBRADÓ LLAURADÓ, Eduard, MAÑOSA, Lluís and PLANES VILA, Antoni. On the stability of the bcc phase in Cu-Al-Mn shape memory alloys. Physical Review B. 1997. Vol. 56, num. 1, pags. 20-23. ISSN 0163-1829. [consulted: 13 of June of 2026]. Available at: https://hdl.handle.net/2445/10468