On the relationship between temperature and critical stress in the two-way shape memory effect of Cu-Zn-Al single crystals

Journal Article · Sat Apr 15 00:00:00 EDT 1995 · Scripta Metallurgica et Materialia

DOI:https://doi.org/10.1016/0956-716X(94)00014-9· OSTI ID:55440

Amengual, A; Cesari, E; Romero, R ^[1]

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1. Univ. de les Illes Balears, Palma de Mallorca (Spain)

The Two Way Shape Memory Effect (TWSME) is one of the most striking properties of shape memory alloys. Due to the martensitic transformation, a sample deformed at low temperature can recover its original shape upon heating, this is the single shape memory effect. In this case, as it is well-known and largely used in technical applications, the recovery can proceed against an applied load. In the TWSME the sample is trained in such a way that it can recover a shape not only on heating but also during cooling. In this way, a sample takes two different shapes depending on temperature. In this work, the authors have focused their attention on the characteristics of the {sigma}-{epsilon}-T (stress-strain-temperature) surface of a Cu-Zn-Al single crystal sample, during and after the training process consisting of pseudoelastic tensile cycling. In order to carry out this work a simple device has been developed which will be introduced here. In the next two sections the experimental details and results are described and, afterwards, the results will be discussed.

• OSTI ID: 55440
• Journal Information: Scripta Metallurgica et Materialia, Vol. 32, Issue 8; Other Information: PBD: 15 Apr 1995
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COPPER ALLOYS
SHAPE MEMORY EFFECT
ZINC ALLOYS
ALUMINIUM ALLOYS
MATERIALS TESTING
TENSILE PROPERTIES
TEMPERATURE DEPENDENCE
PHASE TRANSFORMATIONS
DISLOCATIONS