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Improvements in calorimetry and thermal analysis applied to shape-memory alloys

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Abstract

Calorimetric and thermal analysis set-up applied to study the martensitic transformations in shape-memory alloys is described. The information obtained are as follows: transformation temperature, enthalpy/entropy change and the dynamics of the phenomena. Hysteresis loop and the description of the macroscopic features of the transformation are given.

By means of the improved high resolution thermal analysis techniques local studies (interface movements) were performed and new phenomena, intrinsic thermoelasticity, time scales etc. were introduced.

Zusammenfassung

Es werden kalorimetrische und thermoanalitische Verzuchsanordnungen zur Untersuchung von martenzitischen Umwandlungen bei Form-GedÄchtnis-Legierungen beschrieben. Es wurde folgendes ermittelt: Umwandlungstemperatur, Enthalphie- und EntropieÄnderungen und die Dynamik der Erscheinung. Es werden die Hystereseschleife als auch die makroskopischen Erscheinung der Umwandlung gegeben.

Mittels des verbesserten hochauflösenden Thermoanalyseverfahrens wurden lokale Untersuchungen durch — und neue Erscheinungen wie eigen ThermoelasticitÄt, Zeitskalen usw. eingeführt.

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Author information

Authors and Affiliations

  1. Departament de Fisica, Universitat de les Illes Balears e, 07071, Palma de Mallorca

    V. Torra & H. Tachoire

  2. Laboratoire de Thermochimie, Université de Provence f, 13331, Marseille Cedex 03, France

    H. Tachoire

Authors
  1. V. Torra
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  2. H. Tachoire
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Additional information

This work has been done in the framework of the cooperation between the Université; de Provence and the Universitat de les Illes Balears. The authors acknowledge the financial support from the inter-universities cooperation program of the DGCYT and SGCI (MEC, Spain).

The authors are also indebted to the working group in Materials Science (A. Amengual, C. Picornell, C. Segui, Palma de Mallorca) for its aid in preparing the manuscript and for the new experimental results presented in this paper.

The present Work has been financially supported by CICYT (PA 86-0079 and MAT 89-0407-C03).

V. T. gives thanks to the University of provence for their financial support.

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Torra, V., Tachoire, H. Improvements in calorimetry and thermal analysis applied to shape-memory alloys. Journal of Thermal Analysis 36, 1545–1577 (1990). https://doi.org/10.1007/BF01914076

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