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Fracture and Fatigue of Refractory Metal Intermetallic Composites

Published online by Cambridge University Press:  10 February 2011

William A. Zinsser ,
Sergey Solv'yev  and
John J. Lewandowski
William A. Zinsser
Affiliation:
Cessna Aircraft, Wichita, Kansas
Sergey Solv'yev
Affiliation:
Dept Matl's Sci and Eng – Case Western Reserve Univ, Cleveland, OH 44106
John J. Lewandowski
Affiliation:
Dept Matl's Sci and Eng – Case Western Reserve Univ, Cleveland, OH 44106
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Extract

The fracture and fatigue crack growth characteristics of niobium silicide/Nb(ss) in-situ composites as well as a variety of Nb alloys were determined over a range of temperatures and loading rates. It is shown that the in-situ composites exhibited nominally rate-independent and temperatureindependent values for the toughness with an average toughness exceeding 24 MPa.m0.5. The fatigue behavior of both the Nb alloys and in-situ composites revealed that both the Paris Law exponents and fatigue threshold values were similar to that exhibited by metallic materials.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 552: Symposium KK – High-Temperature Ordered Intermetallic Alloys VIII , 1998 , KK6.10.1
Copyright
Copyright © Materials Research Society 1999

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