Video/animation icon  Changes in microstructure of a shape memory alloy (CuAlNi single crystal)

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Resource type: Video/animation
Description: Changes in microstructure of a shape memory alloy being heat treated and also mechanically deformed. A CuAlNi single crystal (2H orthorhombic phase ) is compressed (vertical axis) at room temperature, causing activation of two sequential twinning deformations. As austenite, the crystal is cube-shaped, whereas in the martensite form it is sheared. Six different sheared martensite crystals, having well - defined prism shapes (three of which appear in this video), can be created by pressing on 3 different faces of the cube. It is essential that the loading arrangement allows lateral displacements to occur. From TLP: Microstructural Changes. Video was kindly donated by Vaclav Novak and Petr Sittner, Department of Functional Materials Institute of Physics of the ASCR, Prague, Czech Republic
Keywords: microstructure • shape memory alloy • deformation
Categories: Science approaches
Science approaches > Microstructure
Properties > Mechanical & thermal > Shape memory
Testing, analysis & experimentation
Created by: DoITPoMS, University of Cambridge
Published by: DoITPoMS, University of Cambridge
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Date created: 26 August 2009
Date added: 25 February 2010
Resource ID: 2718