Image icon  Notched zinc, broken by impact at room temperature

 
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Description: This is a notched zinc specimen broken by impact at room temperature. It has failed by a cleavage mechanism. One can observe the cleavage planes clearly separated by regions of local shear, where the fracture path crosses to adjacent planes. The cleavage planes are atomically flat and are not associated with much plastic deformation. At low temperature metals having b.c.c. and h.c.p structures have insufficient independent slip systems operating and are brittle, fracturing by cleavage.
Keywords: alloy • cleavage • fracture • metal • zinc
Categories: Science approaches > Deformation & failure > Fracture
Science approaches > Microstructure
Materials > Metals & alloys > Other metals & alloys > Zinc & alloys
Properties > Mechanical & thermal > Fracture toughness
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:
Resource ID: 1142