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Ni-superalloy, fatigue crack propagation | by CORE-Materials
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Ni-superalloy, fatigue crack propagation

DoITPoMS, University of Cambridge

 

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.

 

System

Ni-X

 

Composition

Not specified (Ni-Superalloy)

 

Reaction

  

Processing

  

Applications

  

Sample preparation

  

Technique

Scanning electron microscopy (SEM)

 

Contributor

Prof T W Clyne

 

Organisation

Department of Materials Science and Metallurgy, University of Cambridge

 

View micrograph in DoITPoMS website

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Taken on October 25, 2001