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Mechanical Properties of Metal-Intermetallic Microlaminate Composites

Published online by Cambridge University Press:  10 February 2011

J. Heathcote ,
G. R. Odette ,
G. E. Lucas  and
R. G. Rowe
J. Heathcote
Affiliation:
Materials Department, University of California, Santa Barbara, CA 93106, johnhC@engineering.ucsb.edu
G. R. Odette
Affiliation:
Department of Mechanical Engineering, University of California, Santa Barbara, CA 93106
G. E. Lucas
Affiliation:
Department of Mechanical Engineering, University of California, Santa Barbara, CA 93106
R. G. Rowe
Affiliation:
GE CRD, 1 River Road, K-I, MB265, Schenectady, NY 12301
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Abstract

Tensile strengths, static and dynamic fracture toughness, and fatigue crack propagation were measured for different combinations of Nb metal-intermetallic microlaminate composites. Metal layer bridging produced toughening by factors of 2 to 5 under static conditions. Dynamic testing reduced the toughness significantly. Fatigue crack propagation rates were comparable to data for pure Nb. A key composite property, the stress -displacement function σ(u) of the constrained metal layers, was evaluated by several techniques and used in a bridging-crack stability analysis to predict tensile strengths in agreement with experimental values. The results provide guidelines for improving microlaminate performance.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 434: Symposium U – Layered Materials for Structural Applications , 1996 , 101
Copyright
Copyright © Materials Research Society 1996

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