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Toughening of Intermetallics by Coated Ductile Reinforcements

Published online by Cambridge University Press:  21 February 2011

H. E. Deve ,
A. G. Evans  and
R. Mehrabian
H. E. Deve
Affiliation:
Materials Department, University of California, Santa Barbara, California 93106.
A. G. Evans
Affiliation:
Materials Department, University of California, Santa Barbara, California 93106.
R. Mehrabian
Affiliation:
Materials Department, University of California, Santa Barbara, California 93106.
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Abstract

The effects of reinforcement debonding and work hardening on ductile reinforcement toughening of γ-TiAl have been examined. Debonding has been varied by either the development of a brittle reaction product layer or by depositing a thin oxide coating between the reinforcement and matrix. The role of work hardening has been explored by comparing Nb reinforcements that exhibits high work hardening with solution hardened Ti-Nb alloy that exhibits negligible work hardening. It is demonstrated that a high work of rupture is encouraged by extensive debonding when the reinforcement exhibits high work hardening. Conversely, debonding is not beneficial when the reinforcement exhibits low work hardening.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 170: Symposium N – Interfaces in Composites , 1989 , 33
Copyright
Copyright © Materials Research Society 1990

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References

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