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Embrittlement of Cracks at Interfaces

Published online by Cambridge University Press:  10 February 2011

Robb Thomson ,
Emeritus  and
A. E. Carlsson
Robb Thomson
Affiliation:
Materials Science aid Engineering Laboratory National Institute of Standards and Technology Gaithersburg, MD, USA 2089
Emeritus
Affiliation:
Materials Science aid Engineering Laboratory National Institute of Standards and Technology Gaithersburg, MD, USA 2089
A. E. Carlsson
Affiliation:
Department of Physics Washington University St. Louis, MO 63130
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Abstract

This paper presents a synopsis of already published work for cracks on interfaces and new results on the effect of changing the chemistry of the atoms at the interface. Once the appropriate cut-off for the oscillatory singularity in the interface analysis is determined, the physics of the crack is determined in terms of an appropriate driving force for a particular event of interest, and a lattice resistance to the event. Analytic approximations are available for the driving forces, and the lattice resistance is determined on the basis of a block construction for the lattice. We show that for the case where the chemical bonding at the interface is different from that in the matrix, the same ideas are applicable, provided the different chemistry is incorporated correctly in the lattice resistance construction.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 408: Symposium P – Materials Theory, Simulations, and Parallel Algorithms , 1995 , 229
Copyright
Copyright © Materials Research Society 1996

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References

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