Image icon  Zn, cold rolled - mechanical twins

 
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Attribution text: By Prof T W Clyne, DoITPoMS, released under CC BY-NC-SA 2.0 license
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Description: This sample was cold rolled. Zinc has a hexagonal structure so it contains only two independent slip systems. However, for slip to occur, five slip systems are required so zinc does not undergo general plasticity. Instead it forms mechanical twins as an alternative to dislocation motion to accommodate the deformation.
Keywords: alloy • mechanical twins • metal • twinning • zinc • displacement • indentation • Plasticine
Categories: Science approaches > Structure, bonding & defects > Twins
Science approaches > Microstructure
Materials > Metals & alloys > Other metals & alloys > Zinc & alloys
Processes > Shaping > Deformation > Rolling
Testing, analysis & experimentation > Metallography
Scale > Micro
Created by: Prof T W Clyne, Department of Materials Science and Metallurgy, University of Cambridge
DoITPoMS, University of Cambridge
Published by: DoITPoMS, University of Cambridge
License: This resource is released under the Creative Commons Attribution Non-Commercial Share Alike license (2.0 UK: England & Wales).
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Date created: 25 October 2001
Date added: 21 August 2009
Package: DoITPoMS Micrograph Library
Resource ID: 1105