Chapter 37. Comparison of Tension and Flexure to Determine Fatigue Life Prediction Parameters at Elevated Temperatures

  1. John B. Wachtman Jr.
  1. Sung R. Choi1,
  2. Jonathan A. Salem2 and
  3. Joseph L. Palko3

Published Online: 28 MAR 2008

DOI: 10.1002/9780470314180.ch37

Proceedings of the 17th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2: Ceramic Engineering and Science Proceedings, Volume 14, Issue 7/8

Proceedings of the 17th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2: Ceramic Engineering and Science Proceedings, Volume 14, Issue 7/8

How to Cite

Choi, S. R., Salem, J. A. and Palko, J. L. (2008) Comparison of Tension and Flexure to Determine Fatigue Life Prediction Parameters at Elevated Temperatures, in Proceedings of the 17th Annual Conference on Composites and Advanced Ceramic Materials, Part 1 of 2: Ceramic Engineering and Science Proceedings, Volume 14, Issue 7/8 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470314180.ch37

Author Information

  1. 1

    Cleveland State University, Cleveland, OH 44115

  2. 2

    NASA Lewis Research Center, Cleveland, OH 44135

  3. 3

    Cleveland State University, Cleveland, OH 44115

Publication History

  1. Published Online: 28 MAR 2008
  2. Published Print: 1 JAN 1993

ISBN Information

Print ISBN: 9780470375266

Online ISBN: 9780470314180

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Keywords:

  • utilized;
  • dynamic;
  • static fatigue;
  • susceptibility;
  • parameters

Summary

High-temperature slow crack growth of a hot-pressed silicon nitride (NCX 34) was determined at temperatures of 1200° and 1300°C in air. Three different testing methods were utilized: dynamic and static fatigue with bend specimens, and static fatigue with dog-bone-shaped tensile specimens. Good agreement exists between the dynamic and static fatigue results under bending. However, fatigue susceptibility in uniaxial tensile loading was greater than in bending. This result suggests that high-temperature fatigue behavior should be measured with a variety of specimen configurations and loading cycles so that adequate lifetime prediction parameters are obtained.