| EPSRC Reference: |
GR/H66037/01 |
| Title: |
HYSTERETIC AND AC FIELD MAGNETOSTRICTION IN TERFENOL |
| Principal Investigator: |
Greenough, Dr R |
| Other Investigators: |
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| Project Partners: |
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| Department: |
Physics |
| Organisation: |
University of Hull |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
01 November 1992 |
Ends: |
31 October 1994 |
Value (£): |
65,629
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| EPSRC Research Topic Classifications: |
| Magnetism/Magnetic Phenomena |
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| EPSRC Industrial Sector Classifications: |
| Aerospace, Defence and Marine |
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Summary on Grant Application Form |
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This research proposal addresses factors which limit the dynamic performance of Terfenol. Firstly with DC fields, the hysteresis in vs H and especially in vs M will be studied in relation to field strengths, composition, grain structure and thermal treatments. With clear preliminary evidence of -M hysteresis in particular samples, a more comprehensive study will be conducted to enable a useful comparison with recent effective field and magnetoelasticity theories. AC magnetostriction in some initial data for d33 (d /dH) vs frequency indicate that inherent losses, even at a few hundred Hz, limit the ultimate effective speed more than the skin effect. This will be investigated further and hysteresis theories developed in collaboration with Sablik for AC fields. The observed 'freezing' of AC magnetostriction in a surface layer also imposes a limit on the dynamics of Terfenol. In collaboration with Jiles, the experimental mapping of strain profiles will be pursued. FE analysis will be employed to predict the corresponding three-dimensional elastic and magnetoelastic response.
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Key Findings |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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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.hull.ac.uk |