Synchrotron X-ray study of micromechanics of Ti/SiCfcomposites with fibres containing defects introduced by laser drilling
| Autor: | Eric Maire, Michael Preuss, P.M. Mummery, Jean-Yves Buffiere, Sa Mcdonald, P.J. Withers |
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| Rok vydání: | 2002 |
| Předmět: | |
| Zdroj: | Materials Science and Technology. 18:1497-1503 |
| ISSN: | 1743-2847 0267-0836 |
| DOI: | 10.1179/026708302225007583 |
| Popis: | High spatial resolution synchrotron X-ray strain measurement and tomography have been performed on Ti/SiCf composite samples containing controlled distributions of fibre defects introduced by laser drilling. The objective of the study was to gain an understanding of the micromechanics of stress and damage development that occur on progressive straining in the vicinity of damaged fibres. The composite samples were fabricated to contain precisely located fibre defects so that the redistribution of load from damaged fibres to neighbouring ones could be investigated. The interfacial characteristics in these regions, such as the shear stresses at the interface, have been studied. Axial strain measurements were made along each fibre during incremental loading using a small X-ray spot size to obtain strain profiles along each fibre and in the neighbouring matrix. Lower interfacial shear stresses have been found near the holes introduced prior to fabrication than near cracks formed during loading. The in... |
| Databáze: | OpenAIRE |
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