Chapter 35. Evaluation of Fibre-Matrix Interfacial Strength in a SiC Fibre-Reinforced Ti-6A1–4V Composite

  1. J. P. Singh
  1. R. Berriche1,
  2. P. Saxena2,
  3. A. K. Koul1 and
  4. J. Beddoes2

Published Online: 26 MAR 2008

DOI: 10.1002/9780470294437.ch35

Proceedings of the 21st Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A: Ceramic Engineering and Science Proceedings, Volume 18, Issue 3

Proceedings of the 21st Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A: Ceramic Engineering and Science Proceedings, Volume 18, Issue 3

How to Cite

Berriche, R., Saxena, P., Koul, A. K. and Beddoes, J. (1997) Evaluation of Fibre-Matrix Interfacial Strength in a SiC Fibre-Reinforced Ti-6A1–4V Composite, in Proceedings of the 21st Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A: Ceramic Engineering and Science Proceedings, Volume 18, Issue 3 (ed J. P. Singh), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470294437.ch35

Author Information

  1. 1

    Institute for Aerospace Research, National Research Council of Canada, Ottawa Canada K1A 0R6

  2. 2

    Dept. of Mechanical and Aerospace Engineering, Carleton University, Ottawa Canada K1S 5B6

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 1997

ISBN Information

Print ISBN: 9780470375495

Online ISBN: 9780470294437

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Keywords:

  • nanomechanical probe;
  • indentation instrument;
  • heat treatment;
  • microscopic examination;
  • composite

Summary

A high resolution depth sensing indentation instrument, developed at NRC, called the Nanomechanical Probe, was used to conduct fibre push-out (FPO) tests on a SiC fibre-reinforced Ti-6A1–4V composite, produced by a spray method. Samples were tested in the as-fabricated state, after heat treatment and after hot isostatic pressing (HIPing). In all cases, load-displacement plots obtained from the FPO tests showed an initial linear increase in the load with displacement which was followed by a sudden drop of the load. This drop was attributed to failure of the fibre-matrix interface and the start of sliding of the fibre out of the matrix. Scanning electron microscopic examination of the samples after the test showed tested fibres protruding from the sample as a result of sliding during the FPO test. The maximum load values, obtained before the sudden drop, were used in a model to calculate the fibre-matrix interfacial strength. The results indicated that the interfacial strength of the HIPed sample was more than five times higher than that of the as-fabricated sample. The heat treatment, on the other hand, was found to reduce the strength by a factor of two as compared to the as-fabricated material.