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Laminate Orientation and Thickness Effects on An Scs-6/Ti-24ai-11 Nb Composite Under Thermal Fatigue

Published online by Cambridge University Press:  15 February 2011

William C. Revelos  and
Itzhak Roman
William C. Revelos
Affiliation:
Materials Directorate, Wright Laboratory, WL/MLLN Wright-Patterson AFB, OH 45433
Itzhak Roman
Affiliation:
The Hebrew University of Jerusalem, Jerusalem, Israel 91904
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Abstract

A SiC/Ti-24AI-11 Nb (at. %) composite (30–35 vol. %) was thermally cycled in air and an inert environment between 150 °C and 815 °C for various cycle counts. Various hold times at maximum temperature were employed to determine timedependent effects on composite integrity. Laminate orientations investigated included: [0]4, [0]8, [90]4, [90]8 and [0/90]2S. Acoustic emission produced during thermal fatigue of selected specimens was employed to monitor damage progression. Post-cycling room temperature tension tests as well as optical and scanning electron microscopy were used to document damage, which was particularly acute when hold times at temperature were employed on tests performed in air. The roles of the environment, composite thickness, and off-axis fibers during thermal fatigue on the composite strength and integrity are discussed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 273: Symposium Q – Intermetallic Matrix Composites II , 1992 , 53
Copyright
Copyright © Materials Research Society 1992

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References

REFERENCES

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