| EPSRC Reference: |
GR/L48669/01 |
| Title: |
EFFECTS OF MICRO-TEXTURE AND PLANARITY OF SLIP ON THE PROPAGATION OF SHORT FATIGUE CRACKS IN AL-LI ALLOYS |
| Principal Investigator: |
Wilkinson, Professor AJ |
| Other Investigators: |
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| Project Partners: |
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| Department: |
Materials |
| Organisation: |
University of Oxford |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
01 May 1997 |
Ends: |
30 April 2000 |
Value (£): |
227,964
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| EPSRC Research Topic Classifications: |
| Materials Characterisation |
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| EPSRC Industrial Sector Classifications: |
| Aerospace, Defence and Marine |
Manufacturing |
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Summary on Grant Application Form |
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The research aims to characterise the interaction of plastic zones ahead of short fatigue cracks with grain boundaries. Such interactions cause a beneficial retardation of the crack growth. The electron channelling contrast imaging (ECCI) technique, developed at Oxford, will be used to gain previously unobtainable characterisation these plastic zones and to examine the role of grain size, planarity of slip, and grain boundary type on the strength of the crack retardation. The experimental data generated will be used to develop a model based on the dynamics of dislocations during the cyclic loading -unloading of the crack. Microstructural parameters will be incorporated to account for grain size and the planarity of slip. In two commercial Al-Li alloys (8090 and UL30) electron back scatter diffraction (EBSD) will be used to characterise the spatial distribution of grain orientations at the microscopic scale. The paths taken by short fatigue cracks will correlated with crack growth rates, with the aim of identifying microstructural and microtextural features that promote and inhibit the crack growth.
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Key Findings |
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Potential use in non-academic contexts |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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Impacts |
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| Description |
This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk |
| Summary |
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| Date Materialised |
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Sectors submitted by the Researcher |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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| Project URL: |
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| Further Information: |
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| Organisation Website: |
http://www.ox.ac.uk |