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Full Record for Micrograph 730
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- Micrograph no
- 730
- Brief description
- Magnesium alloy
- Keywords
- magnesium
- Categories
- Metal or alloy
- System
- Mg-Zn
- Composition
- Mg 94.05, Zn 5.62, Zr 0.19, Ce 0.10, Nd 0.03 (wt%) (RZ5 Alloy)
- Standard codes
- Reaction
- Processing
- As cast
- Applications
- RZ5 magnesium alloy is commonly used for wheels in both Formula One and Superbike competitions because of its high strength to weight ratio.
- Sample preparation
- Standard polishing techniques
- Technique
- Scanning electron microscopy (SEM) in backscattered electron imaging (BEI) mode
- Length bar
- 200 μm
- Further information
- 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 200mm 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.
- Contributor
- R J Mitchell
- Organisation
- Department of Engineering, University of Leicester
- Date
- 05/03/03
- Licence for re-use
Attribution-NonCommercial-ShareAlike 4.0 International- Related micrographs