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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Journal of thermal analysis and calorimetry 38 (1992), S. 583-592 
    ISSN: 1572-8943
    Keywords: shape memory alloys
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Es wird ein Versuchsaufbau unter Ausnutzung des Peltier-Effektes und eines Computers für die hochauflösende Thermoanalyse (HRTA) beschrieben. Die Signalverarbeitung erlaubt eine hochauflösende Programmierung der Temperatur und eine Reproduzierbarkeit besser als ±0.01 K. Das Grundgerät eignet sich zur Untersuchung des Verhaltens von Legierungen mit Formerin-nerungsvermögen (z.B. Legierungen auf Kupferbasis). Auch die Anwendungen des Systemes werden beschrieben, was den Aufbau einer kalorimetrischen Anlage (Wärmefluß- oder Leitfähigkeitskalorimetrie mit einer Auflösung von 1.5 μW) oder einer Zug-Dehnungstemperatur-Anlage mit 20 N Höchstlast (Auflösung bei 1 mN und 0.1 μm) ermöglicht.
    Notes: Abstract We describe an experimental set-up of high resolution thermal analysis (HRTA) activated by Peltier effect and computer-controlled by the signal processing that allows a high resolution programming of the temperature and a reproducibility better than ±0.01 deg. The basic equipment is suitable for studying the behaviour of the shape memory alloys (i.e. Cu based alloys). We also describe the applications of the system, which allows to build up a calorimetric system (heat flux or conduction calorimetry) (resolution 1.5 μW) or a stress-strain-temperature system of 20 N of maximum charge (resolution around 1 mN and 0.1 μm.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Journal of thermal analysis and calorimetry 47 (1996), S. 151-163 
    ISSN: 1572-8943
    Keywords: modelling ; shape memory alloys ; thermal analysis ; thermomechanical equipment ; time effects
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Reliability is a critical word in industrial applications of Shape Memory Alloys. Accurate and reproducible transformation hysteresis cycles and internal loops were obtained in single crystals using a high resolution automatized equipment. From a mechanical model formulated for a single martensite plate, the shape of the hysteresis cycle is obtained by generalizing the representation toN plates. The observed time effects on the hysteresis loops related to diffusion processes were also taken into account. It allows to explain the martensite recoverable creep and the micromemory effects. Also, the room temperature effects on the parent phase (for instance, summer to winter) acting over the transformation temperature are quantified.
    Type of Medium: Electronic Resource
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