Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/53543
Title: Atomic Ordering and Martensitic Transitions in Cu-Zn-Al Shape Memory Alloys
Author: Macqueron, J. L.
Morin, Michel
Guénin, G.
Planes Vila, Antoni
Elgueta, J.
Castán i Vidal, Maria Teresa
Keywords: Termodinàmica
Transformacions martensítiques
Metalls
Aliatges
Química de l'estat sòlid
Thermodynamics
Martensitic transformations
Metals
Alloys
Solid state chemistry
Issue Date: 1-Nov-1991
Publisher: EDP Sciences
Abstract: We present results from both, calorimetric and dilatometric studies of the isothermal ordering process taking place in a Cu-Zn-Al shape memory alloy after quenches from Tq temperatures ranging from 350 K to 1200 K. The dissipated energy and the length variations of the system are obtained during the process. The change of these quantities in the whole process have been compared with the difference [MATH] between Ms, measured after the relaxation and Ms measured just after the quench. We obtain that these three quantities present, as a function of Tq, the same qualitative behaviour. These changes are then associated with changes of the L21 ordering after the quench in the system. The relaxational process does not follow a single exponential decay. Instead, a continuous slowing down is observed. A relaxation time [MATH] has been defined to characterize the relaxation rate. We show that [MATH] depends on both the annealing and the quenching (Tq [MATH] 800 K) temperatures through an Arrhenius law.
Note: Reproducció del document publicat a: http://dx.doi.org/ 10.1051/jp4:1991439
It is part of: Journal de Physique IV, 1991, vol. 1, num. C4, p. 259-263
URI: http://hdl.handle.net/2445/53543
DOI: http://dx.doi.org/10.1051/jp4:1991439
ISSN: 1155-4339
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)

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