On the stability of the bcc phase in Cu-Al-Mn shape memory alloys
Data(s) |
24/12/2009
24/12/2009
1997
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Resumo |
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. |
Formato |
4 p. application/pdf |
Identificador |
0163-1829 http://hdl.handle.net/2445/10468 147475 |
Idioma(s) |
eng |
Publicador |
The American Physical Society |
Relação |
Reproducció digital del document publicat en format paper, proporcionada per PROLA i http://dx.doi.org/10.1103/PhysRevB.56.20 Physical Review B, 1997, vol. 56, núm. 1, p. 20-23 |
Direitos |
(c) The American Physical Society, 1997 info:eu-repo/semantics/openAccess |
Palavras-Chave | #Aliatges #Transformacions martensítiques #Alloys #Martensitic transformations |
Tipo |
info:eu-repo/semantics/article |