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Title: On the stability of the bcc phase in Cu-Al-Mn shape memory alloys
Author: Obradó Llauradó, Eduard
Mañosa, Lluís
Planes Vila, Antoni
Keywords: Aliatges
Transformacions martensítiques
Martensitic transformations
Issue Date: 1997
Publisher: The American Physical Society
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.
Note: Reproducció digital del document publicat en format paper, proporcionada per PROLA i
It is part of: Physical Review B, 1997, vol. 56, núm. 1, p. 20-23
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ISSN: 0163-1829
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)

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