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Description: This RZ5 alloy is from an actual cast specimen. The billet was approximately 75mm diameter by 100mm in length. The cast billet has a characteristically rough surface, associated with the grain size of the sand used in the mould. This interaction between the cool mould and the hot casting, has an important role to play in the microstructure that develops throughout the billet. The microstructure varies as progression is made from the edge of the billet to the centre. The grains are approximately 200μm equiaxed. The grain boundary phase that is present is mainly composed of zinc and the rare earth elements and becomes sparser as the edge of the billet is approached.
Keywords: magnesium
Categories: Science approaches > Microstructure
Materials > Metals & alloys > Magnesium & alloys
Testing, analysis & experimentation > Metallography
Scale > Micro
Created by: DoITPoMS, University of Cambridge
R J Mitchell, Department of Engineering, University of Leicester
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: 05 March 2003
Date added: 21 August 2009
Resource ID: 1759