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Interfacial Shear Behavior of Two Titanium-Based SCS-6 Model Composites

Published online by Cambridge University Press:  15 February 2011

I. Roman  and
P. D. Jero
I. Roman
Affiliation:
Wright Laboratory, Materials Directorate, WI./MLLM, WPAFB OH 45433
P. D. Jero
Affiliation:
Wright Laboratory, Materials Directorate, WI./MLLM, WPAFB OH 45433
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Abstract

Single fiber push-out and push-back tests combined with acoustic response monitoring were used to examine the interfacial behavior in two titanium alloy-SiC fiber composites. Distinctly different behaviors were observed in the two systems. The differences were attributed to the formation of a substantial interfacial reaction layer in one of the composites which changed the interfacial chemistry and the resulting debond topography. The reaction layer caused an increase in the interfacial bond strength and in the roughness of the debonded interface. The latter resulted in substantially increased sliding friction. Although both composite interfaces exhibited some roughness, only one showed a seating drop during fiber push-back. This is related to the fact that the reaction layer which formed in one of the composites was severely degraded during fiber pushout. Although this interface was still rough, the roughness correspondence between fiber and matrix was destroyed during sliding, such that seating was no longer possible.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 273: Symposium Q – Intermetallic Matrix Composites II , 1992 , 337
Copyright
Copyright © Materials Research Society 1992

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