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Full Record for Micrograph 80
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- Micrograph no
- 80
- Brief description
- Ni-superalloy, fatigue crack propagation
- Keywords
- alloy
, fatigue , fracture , metal, nickel, order hardening - Categories
- Fracture, Metal or alloy
- System
- Ni-X
- Composition
- Not specified (Ni-Superalloy)
- Standard codes
- Reaction
- Processing
- Applications
- Sample preparation
- Technique
- Scanning electron microscopy (SEM)
- Length bar
- 80 μm
- Further information
- This sample shows fatigue crack propagation in Udimet 720, a nickel-base superalloy. To improve its high temperature mechanical properties Udimet 720 utilises a strengthening mechanism, known as order hardening. There is a large volume fraction of coherent g' precipitates in the g matrix. As a fatigue crack propagates through the superalloy there is a plastic region in front of the crack tip.
- Contributor
- Prof T W Clyne
- Organisation
- Department of Materials Science and Metallurgy, University of Cambridge
- Date
- 25/10/01
- Licence for re-use
Attribution-Non-Commercial-Share Alike 2.0 UK: England & Wales- Related micrographs