Chapter 7. Fully-Reversed Cyclic Fatigue Response of Ceramic Matrix Composites at Elevated Temperature

  1. John B. Wachtman Jr
  1. Mehran Elahi1,
  2. Kin Liao1,
  3. Kenneth Reifsnider1 and
  4. Thomas Dunyak2

Published Online: 26 MAR 2008

DOI: 10.1002/9780470314715.ch7

Proceedings of the 19th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures - A: Ceramic Engineering and Science Proceedings, Volume 16, Issue 4

Proceedings of the 19th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures - A: Ceramic Engineering and Science Proceedings, Volume 16, Issue 4

How to Cite

Elahi, M., Liao, K., Reifsnider, K. and Dunyak, T. (1995) Fully-Reversed Cyclic Fatigue Response of Ceramic Matrix Composites at Elevated Temperature, in Proceedings of the 19th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures - A: Ceramic Engineering and Science Proceedings, Volume 16, Issue 4 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470314715.ch7

Author Information

  1. 1

    Engineering Science and Mechanics Dept., Materials Response Group, Blacksburg, VA. 24061

  2. 2

    Thomas Dunyak, GE Aircraft Engines, Cincinnati, OH. 45215.

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 1995

ISBN Information

Print ISBN: 9780470375372

Online ISBN: 9780470314715

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Keywords:

  • fatigue;
  • thermomechanical;
  • propulsion;
  • compressive;
  • extensometer

Summary

Fully-reversed cyclic fatigue response of 2-D woven SiC,(Nicalon*) fiber reinforced enhanced silicon carbide (E-SiC**) matrix composites were investigated at 982 °C under various load levels. Maximum applied cyclic stresses above the matrix cracking stress (critical stress) resulted in significantly shorter fatigue lives. Cyclic effect was also investigated by performing interrupted fatigue tests at the “early,” “middle,” and “late” stages of fatigue damage development. Oxidation may play a significant role.