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The Effect of Phase Angle on the Thermo-Mechanical Fatigue Life of a Titanium Metal Matrix Composite
Materials, Volume: 12, Issue: 6, Start page: 953
Swansea University Author:
Mark Whittaker
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DOI (Published version): 10.3390/ma12060953
Abstract
The thermo-mechanical fatigue (TMF) behaviour of a Ti-6Al-4V matrix composite reinforced with SCS-6 silicon carbide fibres (140 μm longitudinal fibres, laid up hexagonally) has been investigated. In-phase and out-of-phase TMF cycles were utilized, cycling between 80–300 °C, with varying maximum stre...
| Published in: | Materials |
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| ISSN: | 1996-1944 |
| Published: |
MDPI AG
2019
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| Online Access: |
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa49698 |
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| Abstract: |
The thermo-mechanical fatigue (TMF) behaviour of a Ti-6Al-4V matrix composite reinforced with SCS-6 silicon carbide fibres (140 μm longitudinal fibres, laid up hexagonally) has been investigated. In-phase and out-of-phase TMF cycles were utilized, cycling between 80–300 °C, with varying maximum stress. The microstructure and fracture surfaces were studied using electron backscatter diffraction (EBSD), energy-dispersive X-ray spectroscopy (EDS), scanning electron microscopy (SEM), profilometry, and optical microscopy. The results have shown the damaging effect of out-of-phase cycling with crack initiation occurring earlier than in in-phase tests and crack propagation rates being accelerated in out-of-phase cycles. Fatigue crack initiation has been shown to be sensitive to crystallographic texture in the cladding material and thermo-mechanical fatigue test results can be considered according to a previously proposed conceptual framework for the interpretation of metal matrix composite fatigue. |
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| Keywords: |
titanium; silicon carbide; TMF; texture |
| College: |
Faculty of Science and Engineering |
| Issue: |
6 |
| Start Page: |
953 |