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Energy contributions in the martensitic transformation of shape-memory alloys |
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| Authors: | A. Planes J. L. Macqueron J. Ortín |
| Affiliation: | 1. Departament d'Estructura i Constituents de la Matèria, Facultat de Fisica , Universitat de Barcelona , Diagonal 645, 08028, Barcelona, Spain;2. Laboratoire de Traitement du Signal et Ultrasons, I.N.S.A. , 20 Av. A. Einstein, 69621, Villeurbanne, France;3. Departament de Física, Facultat de Ciències , Universitat de les Illes Balears , 07071, Palma de Mallorca, Spain |
| Abstract: | Abstract The thermoelastic martensitic transformation in shape-memory alloys is studied thermodynamically. Calorimetric experiments on the Cu─Zn─A1 alloy system reveal that the transformation takes place with a practically negligible entropy production. The usual hysteretic subloop behaviour during partial cycling is obtained for the first time by calorimetry. An analysis of the measurements gives the quantitative behaviour of elastic and dissipative energies with the volume fraction of martensite. |
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